diff --git a/.idea/workspace.xml b/.idea/workspace.xml
index 7c2ae16..58392a8 100644
--- a/.idea/workspace.xml
+++ b/.idea/workspace.xml
@@ -4,8 +4,17 @@
     <option name="autoReloadType" value="SELECTIVE" />
   </component>
   <component name="ChangeListManager">
-    <list default="true" id="d7a71994-2699-4ae4-9fd2-ee13b7f33d35" name="Changes" comment="docs: add Virtual Control Room (VCR) sample application info to README.md&#10;&#10;- Added a new section describing the Virtual Control Room (VCR) as a sample application.&#10;&#10;- Explained how VCR utilizes key API features like hierarchical mapping, dynamic authorization, mass provisioning, and data visualization.&#10;&#10;- Included a link to the technical product information PDF in the docs folder.&#10;&#10;- Added VCR to the Key Features list.">
+    <list default="true" id="d7a71994-2699-4ae4-9fd2-ee13b7f33d35" name="Changes" comment="chore: update base host group name from &quot;Baustellen-Devices&quot; to &quot;Roadwork&quot; in code, tests, and documentation">
       <change beforePath="$PROJECT_DIR$/.idea/workspace.xml" beforeDir="false" afterPath="$PROJECT_DIR$/.idea/workspace.xml" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/package-lock.json" beforeDir="false" afterPath="$PROJECT_DIR$/package-lock.json" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/package.json" beforeDir="false" afterPath="$PROJECT_DIR$/package.json" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/src/api/resolvers.ts" beforeDir="false" afterPath="$PROJECT_DIR$/src/api/resolvers.ts" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/src/api/schema.ts" beforeDir="false" afterPath="$PROJECT_DIR$/src/api/schema.ts" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/src/common_utils.ts" beforeDir="false" afterPath="$PROJECT_DIR$/src/common_utils.ts" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/src/datasources/zabbix-api.ts" beforeDir="false" afterPath="$PROJECT_DIR$/src/datasources/zabbix-api.ts" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/src/datasources/zabbix-permissions.ts" beforeDir="false" afterPath="$PROJECT_DIR$/src/datasources/zabbix-permissions.ts" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/src/index.ts" beforeDir="false" afterPath="$PROJECT_DIR$/src/index.ts" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/src/logging/logger.ts" beforeDir="false" afterPath="$PROJECT_DIR$/src/logging/logger.ts" afterDir="false" />
     </list>
     <option name="SHOW_DIALOG" value="false" />
     <option name="HIGHLIGHT_CONFLICTS" value="true" />
@@ -74,7 +83,7 @@
     "go.import.settings.migrated": "true",
     "javascript.preferred.runtime.type.id": "node",
     "junie.onboarding.icon.badge.shown": "true",
-    "last_opened_file_path": "//wsl.localhost/Ubuntu/home/ahilbig/git/vcr/zabbix-graphql-api/docs",
+    "last_opened_file_path": "//wsl.localhost/Ubuntu/home/ahilbig/git/vcr/zabbix-graphql-api/src",
     "node.js.detected.package.eslint": "true",
     "node.js.detected.package.tslint": "true",
     "node.js.selected.package.eslint": "(autodetect)",
@@ -85,6 +94,7 @@
     "npm.compile.executor": "Run",
     "npm.copy-schema.executor": "Run",
     "npm.prod.executor": "Run",
+    "npm.test.executor": "Run",
     "settings.editor.selected.configurable": "settings.javascript.runtime",
     "to.speed.mode.migration.done": "true",
     "ts.external.directory.path": "\\\\wsl.localhost\\Ubuntu\\home\\ahilbig\\git\\vcr\\zabbix-graphql-api\\node_modules\\typescript\\lib",
@@ -100,17 +110,17 @@
   </component>
   <component name="RecentsManager">
     <key name="CopyFile.RECENT_KEYS">
+      <recent name="\\wsl.localhost\Ubuntu\home\ahilbig\git\vcr\zabbix-graphql-api\src" />
+      <recent name="\\wsl.localhost\Ubuntu\home\ahilbig\git\vcr\zabbix-graphql-api\dist" />
       <recent name="\\wsl.localhost\Ubuntu\home\ahilbig\git\vcr\zabbix-graphql-api\docs" />
       <recent name="\\wsl.localhost\Ubuntu\home\ahilbig\git\vcr\zabbix-graphql-api\src\testdata\templates" />
       <recent name="\\wsl.localhost\Ubuntu\home\ahilbig\git\vcr\zabbix-graphql-api\src\test" />
-      <recent name="\\wsl.localhost\Ubuntu\home\ahilbig\git\vcr\zabbix-graphql-api\.forgejo\workflows" />
-      <recent name="\\wsl.localhost\Ubuntu\home\ahilbig\git\vcr\zabbix-graphql-api" />
     </key>
     <key name="MoveFile.RECENT_KEYS">
       <recent name="\\wsl.localhost\Ubuntu\home\ahilbig\git\vcr\zabbix-graphql-api\schema" />
     </key>
   </component>
-  <component name="RunManager" selected="npm.codegen">
+  <component name="RunManager" selected="npm.test">
     <configuration name="copy-schema" type="js.build_tools.npm" temporary="true" nameIsGenerated="true">
       <package-json value="$PROJECT_DIR$/package.json" />
       <command value="run" />
@@ -162,9 +172,9 @@
     </list>
     <recent_temporary>
       <list>
+        <item itemvalue="npm.test" />
         <item itemvalue="npm.prod" />
         <item itemvalue="npm.copy-schema" />
-        <item itemvalue="npm.test" />
         <item itemvalue="npm.prod" />
         <item itemvalue="npm.copy-schema" />
       </list>
@@ -335,7 +345,15 @@
       <option name="project" value="LOCAL" />
       <updated>1769514926656</updated>
     </task>
-    <option name="localTasksCounter" value="19" />
+    <task id="LOCAL-00019" summary="chore: update base host group name from &quot;Baustellen-Devices&quot; to &quot;Roadwork&quot; in code, tests, and documentation">
+      <option name="closed" value="true" />
+      <created>1769525714791</created>
+      <option name="number" value="00019" />
+      <option name="presentableId" value="LOCAL-00019" />
+      <option name="project" value="LOCAL" />
+      <updated>1769525714791</updated>
+    </task>
+    <option name="localTasksCounter" value="20" />
     <servers />
   </component>
   <component name="TypeScriptGeneratedFilesManager">
@@ -374,7 +392,8 @@
     <MESSAGE value="docs: enhance GraphQL schema documentation&#10;&#10;- Added comprehensive descriptions to all types, interfaces, and fields in 'schema/api_commons.graphql'.&#10;&#10;- Improved documentation for mutations and input/response types in 'schema/mutations.graphql'.&#10;&#10;- Added detailed descriptions for all queries and their arguments in 'schema/queries.graphql'.&#10;&#10;- Enhanced documentation for core Zabbix types and enums in 'schema/zabbix.graphql'.&#10;&#10;- Updated extension schemas under 'schema/extensions/' with proper GraphQL descriptions.&#10;&#10;- Verified schema validity via 'graphql-codegen' and ran all tests to ensure consistency." />
     <MESSAGE value="chore: update Docker image path in workflows and README" />
     <MESSAGE value="docs: add Virtual Control Room (VCR) sample application info to README.md&#10;&#10;- Added a new section describing the Virtual Control Room (VCR) as a sample application.&#10;&#10;- Explained how VCR utilizes key API features like hierarchical mapping, dynamic authorization, mass provisioning, and data visualization.&#10;&#10;- Included a link to the technical product information PDF in the docs folder.&#10;&#10;- Added VCR to the Key Features list." />
-    <option name="LAST_COMMIT_MESSAGE" value="docs: add Virtual Control Room (VCR) sample application info to README.md&#10;&#10;- Added a new section describing the Virtual Control Room (VCR) as a sample application.&#10;&#10;- Explained how VCR utilizes key API features like hierarchical mapping, dynamic authorization, mass provisioning, and data visualization.&#10;&#10;- Included a link to the technical product information PDF in the docs folder.&#10;&#10;- Added VCR to the Key Features list." />
+    <MESSAGE value="chore: update base host group name from &quot;Baustellen-Devices&quot; to &quot;Roadwork&quot; in code, tests, and documentation" />
+    <option name="LAST_COMMIT_MESSAGE" value="chore: update base host group name from &quot;Baustellen-Devices&quot; to &quot;Roadwork&quot; in code, tests, and documentation" />
   </component>
   <component name="XDebuggerManager">
     <breakpoint-manager>
diff --git a/package-lock.json b/package-lock.json
index 831adc2..5ffedf7 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -7,6 +7,7 @@
     "": {
       "name": "zabbix-graphql-api",
       "version": "1.0.0",
+      "license": "AGPL-3.0-only",
       "dependencies": {
         "@apollo/datasource-rest": "^6.3.0",
         "@apollo/server": "^5.2.0",
@@ -14,6 +15,7 @@
         "@graphql-tools/schema": "^10.0.30",
         "class-transformer": "^0.5.1",
         "cors": "^2.8.5",
+        "dotenv": "^17.2.3",
         "graphql": "^16.12.0",
         "graphql-scalars": "^1.23.0",
         "graphql-subscriptions": "^3.0.0",
@@ -403,6 +405,7 @@
       "integrity": "sha512-e7jT4DxYvIDLk1ZHmU/m/mB19rex9sv0c2ftBtjSBv+kVM/902eh0fINUzD7UwLLNR+jU585GxUJ8/EBfAM5fw==",
       "dev": true,
       "license": "MIT",
+      "peer": true,
       "dependencies": {
         "@babel/code-frame": "^7.27.1",
         "@babel/generator": "^7.28.5",
@@ -2475,6 +2478,18 @@
         "node": ">=18.0.0"
       }
     },
+    "node_modules/@graphql-tools/prisma-loader/node_modules/dotenv": {
+      "version": "16.6.1",
+      "resolved": "https://registry.npmjs.org/dotenv/-/dotenv-16.6.1.tgz",
+      "integrity": "sha512-uBq4egWHTcTt33a72vpSG0z3HnPuIl6NqYcTrKEg2azoEyl2hpW0zqlxysq2pK9HlDIHyHyakeYaYnSAwd8bow==",
+      "dev": true,
+      "engines": {
+        "node": ">=12"
+      },
+      "funding": {
+        "url": "https://dotenvx.com"
+      }
+    },
     "node_modules/@graphql-tools/prisma-loader/node_modules/urlpattern-polyfill": {
       "version": "10.1.0",
       "resolved": "https://registry.npmjs.org/urlpattern-polyfill/-/urlpattern-polyfill-10.1.0.tgz",
@@ -3088,6 +3103,7 @@
       "dev": true,
       "hasInstallScript": true,
       "license": "MIT",
+      "peer": true,
       "dependencies": {
         "detect-libc": "^1.0.3",
         "is-glob": "^4.0.3",
@@ -3753,6 +3769,7 @@
       "integrity": "sha512-1N9SBnWYOJTrNZCdh/yJE+t910Y128BoyY+zBLWhL3r0TYzlTmFdXrPwHL9DyFZmlEXNQQolTZh3KHV31QDhyA==",
       "dev": true,
       "license": "MIT",
+      "peer": true,
       "dependencies": {
         "undici-types": "~6.21.0"
       }
@@ -3894,7 +3911,6 @@
       "version": "1.3.8",
       "resolved": "https://registry.npmjs.org/accepts/-/accepts-1.3.8.tgz",
       "integrity": "sha512-PYAthTa2m2VKxuvSD3DPC/Gy+U+sOA1LAuT8mkmRuvw+NACSaeXEQ+NHcVF7rONl6qcaxV3Uuemwawk+7+SJLw==",
-      "peer": true,
       "dependencies": {
         "mime-types": "~2.1.34",
         "negotiator": "0.6.3"
@@ -3907,7 +3923,6 @@
       "version": "1.52.0",
       "resolved": "https://registry.npmjs.org/mime-db/-/mime-db-1.52.0.tgz",
       "integrity": "sha512-sPU4uV7dYlvtWJxwwxHD0PuihVNiE7TyAbQ5SWxDCB9mUYvOgroQOwYQQOKPJ8CIbE+1ETVlOoK1UC2nU3gYvg==",
-      "peer": true,
       "engines": {
         "node": ">= 0.6"
       }
@@ -3916,7 +3931,6 @@
       "version": "2.1.35",
       "resolved": "https://registry.npmjs.org/mime-types/-/mime-types-2.1.35.tgz",
       "integrity": "sha512-ZDY+bPm5zTTF+YpCrAU9nK0UgICYPT0QtT1NZWFv4s++TNkcgVaT0g6+4R2uI4MjQjzysHB1zxuWL50hzaeXiw==",
-      "peer": true,
       "dependencies": {
         "mime-db": "1.52.0"
       },
@@ -3928,7 +3942,6 @@
       "version": "0.6.3",
       "resolved": "https://registry.npmjs.org/negotiator/-/negotiator-0.6.3.tgz",
       "integrity": "sha512-+EUsqGPLsM+j/zdChZjsnX51g4XrHFOIXwfnCVPGlQk/k5giakcKsuxCObBRu6DSm9opw/O6slWbJdghQM4bBg==",
-      "peer": true,
       "engines": {
         "node": ">= 0.6"
       }
@@ -4056,8 +4069,7 @@
     "node_modules/array-flatten": {
       "version": "1.1.1",
       "resolved": "https://registry.npmjs.org/array-flatten/-/array-flatten-1.1.1.tgz",
-      "integrity": "sha512-PCVAQswWemu6UdxsDFFX/+gVeYqKAod3D3UVm91jHwynguOwAvYPhx8nNlM++NqRcK6CxxpUafjmhIdKiHibqg==",
-      "peer": true
+      "integrity": "sha512-PCVAQswWemu6UdxsDFFX/+gVeYqKAod3D3UVm91jHwynguOwAvYPhx8nNlM++NqRcK6CxxpUafjmhIdKiHibqg=="
     },
     "node_modules/array-union": {
       "version": "2.1.0",
@@ -4372,6 +4384,7 @@
         }
       ],
       "license": "MIT",
+      "peer": true,
       "dependencies": {
         "baseline-browser-mapping": "^2.9.0",
         "caniuse-lite": "^1.0.30001759",
@@ -4885,7 +4898,6 @@
       "version": "0.5.4",
       "resolved": "https://registry.npmjs.org/content-disposition/-/content-disposition-0.5.4.tgz",
       "integrity": "sha512-FveZTNuGw04cxlAiWbzi6zTAL/lhehaWbTtgluJh4/E95DqMwTmha3KZN1aAWA8cFIhHzMZUvLevkw5Rqk+tSQ==",
-      "peer": true,
       "dependencies": {
         "safe-buffer": "5.2.1"
       },
@@ -4913,7 +4925,6 @@
       "version": "0.7.2",
       "resolved": "https://registry.npmjs.org/cookie/-/cookie-0.7.2.tgz",
       "integrity": "sha512-yki5XnKuf750l50uGTllt6kKILY4nQ1eNIQatoXEByZ5dWgnKqbnqmTrBE5B4N7lrMJKQ2ytWMiTO2o0v6Ew/w==",
-      "peer": true,
       "engines": {
         "node": ">= 0.6"
       }
@@ -4921,8 +4932,7 @@
     "node_modules/cookie-signature": {
       "version": "1.0.7",
       "resolved": "https://registry.npmjs.org/cookie-signature/-/cookie-signature-1.0.7.tgz",
-      "integrity": "sha512-NXdYc3dLr47pBkpUCHtKSwIOQXLVn8dZEuywboCOJY/osA0wFSLlSawr3KN8qXJEyX66FcONTH8EIlVuK0yyFA==",
-      "peer": true
+      "integrity": "sha512-NXdYc3dLr47pBkpUCHtKSwIOQXLVn8dZEuywboCOJY/osA0wFSLlSawr3KN8qXJEyX66FcONTH8EIlVuK0yyFA=="
     },
     "node_modules/cors": {
       "version": "2.8.5",
@@ -5149,7 +5159,6 @@
       "version": "1.2.0",
       "resolved": "https://registry.npmjs.org/destroy/-/destroy-1.2.0.tgz",
       "integrity": "sha512-2sJGJTaXIIaR1w4iJSNoN0hnMY7Gpc/n8D4qSCJw8QqFWXf7cuAgnEHxBpweaVcPevC2l3KpjYCx3NypQQgaJg==",
-      "peer": true,
       "engines": {
         "node": ">= 0.8",
         "npm": "1.2.8000 || >= 1.4.16"
@@ -5233,10 +5242,9 @@
       }
     },
     "node_modules/dotenv": {
-      "version": "16.6.1",
-      "resolved": "https://registry.npmjs.org/dotenv/-/dotenv-16.6.1.tgz",
-      "integrity": "sha512-uBq4egWHTcTt33a72vpSG0z3HnPuIl6NqYcTrKEg2azoEyl2hpW0zqlxysq2pK9HlDIHyHyakeYaYnSAwd8bow==",
-      "dev": true,
+      "version": "17.2.3",
+      "resolved": "https://registry.npmjs.org/dotenv/-/dotenv-17.2.3.tgz",
+      "integrity": "sha512-JVUnt+DUIzu87TABbhPmNfVdBDt18BLOWjMUFJMSi/Qqg7NTYtabbvSNJGOJ7afbRuv9D/lngizHtP7QyLQ+9w==",
       "license": "BSD-2-Clause",
       "engines": {
         "node": ">=12"
@@ -5437,7 +5445,6 @@
       "version": "1.8.1",
       "resolved": "https://registry.npmjs.org/etag/-/etag-1.8.1.tgz",
       "integrity": "sha512-aIL5Fx7mawVa300al2BnEE4iNvo1qETxLrPI/o05L7z6go7fCw1J6EQmbK4FmJ2AS7kgVF/KEZWufBfdClMcPg==",
-      "peer": true,
       "engines": {
         "node": ">= 0.6"
       }
@@ -5496,7 +5503,6 @@
       "version": "4.22.1",
       "resolved": "https://registry.npmjs.org/express/-/express-4.22.1.tgz",
       "integrity": "sha512-F2X8g9P1X7uCPZMA3MVf9wcTqlyNp7IhH5qPCI0izhaOIYXaW9L535tGA3qmjRzpH+bZczqq7hVKxTR4NWnu+g==",
-      "peer": true,
       "dependencies": {
         "accepts": "~1.3.8",
         "array-flatten": "1.1.1",
@@ -5542,7 +5548,6 @@
       "version": "1.20.4",
       "resolved": "https://registry.npmjs.org/body-parser/-/body-parser-1.20.4.tgz",
       "integrity": "sha512-ZTgYYLMOXY9qKU/57FAo8F+HA2dGX7bqGc71txDRC1rS4frdFI5R7NhluHxH6M0YItAP0sHB4uqAOcYKxO6uGA==",
-      "peer": true,
       "dependencies": {
         "bytes": "~3.1.2",
         "content-type": "~1.0.5",
@@ -5566,7 +5571,6 @@
       "version": "2.6.9",
       "resolved": "https://registry.npmjs.org/debug/-/debug-2.6.9.tgz",
       "integrity": "sha512-bC7ElrdJaJnPbAP+1EotYvqZsb3ecl5wi6Bfi6BJTUcNowp6cvspg0jXznRTKDjm/E7AdgFBVeAPVMNcKGsHMA==",
-      "peer": true,
       "dependencies": {
         "ms": "2.0.0"
       }
@@ -5575,7 +5579,6 @@
       "version": "1.3.2",
       "resolved": "https://registry.npmjs.org/finalhandler/-/finalhandler-1.3.2.tgz",
       "integrity": "sha512-aA4RyPcd3badbdABGDuTXCMTtOneUCAYH/gxoYRTZlIJdF0YPWuGqiAsIrhNnnqdXGswYk6dGujem4w80UJFhg==",
-      "peer": true,
       "dependencies": {
         "debug": "2.6.9",
         "encodeurl": "~2.0.0",
@@ -5593,7 +5596,6 @@
       "version": "0.4.24",
       "resolved": "https://registry.npmjs.org/iconv-lite/-/iconv-lite-0.4.24.tgz",
       "integrity": "sha512-v3MXnZAcvnywkTUEZomIActle7RXXeedOR31wwl7VlyoXO4Qi9arvSenNQWne1TcRwhCL1HwLI21bEqdpj8/rA==",
-      "peer": true,
       "dependencies": {
         "safer-buffer": ">= 2.1.2 < 3"
       },
@@ -5605,7 +5607,6 @@
       "version": "0.3.0",
       "resolved": "https://registry.npmjs.org/media-typer/-/media-typer-0.3.0.tgz",
       "integrity": "sha512-dq+qelQ9akHpcOl/gUVRTxVIOkAJ1wR3QAvb4RsVjS8oVoFjDGTc679wJYmUmknUF5HwMLOgb5O+a3KxfWapPQ==",
-      "peer": true,
       "engines": {
         "node": ">= 0.6"
       }
@@ -5614,7 +5615,6 @@
       "version": "1.52.0",
       "resolved": "https://registry.npmjs.org/mime-db/-/mime-db-1.52.0.tgz",
       "integrity": "sha512-sPU4uV7dYlvtWJxwwxHD0PuihVNiE7TyAbQ5SWxDCB9mUYvOgroQOwYQQOKPJ8CIbE+1ETVlOoK1UC2nU3gYvg==",
-      "peer": true,
       "engines": {
         "node": ">= 0.6"
       }
@@ -5623,7 +5623,6 @@
       "version": "2.1.35",
       "resolved": "https://registry.npmjs.org/mime-types/-/mime-types-2.1.35.tgz",
       "integrity": "sha512-ZDY+bPm5zTTF+YpCrAU9nK0UgICYPT0QtT1NZWFv4s++TNkcgVaT0g6+4R2uI4MjQjzysHB1zxuWL50hzaeXiw==",
-      "peer": true,
       "dependencies": {
         "mime-db": "1.52.0"
       },
@@ -5634,14 +5633,12 @@
     "node_modules/express/node_modules/ms": {
       "version": "2.0.0",
       "resolved": "https://registry.npmjs.org/ms/-/ms-2.0.0.tgz",
-      "integrity": "sha512-Tpp60P6IUJDTuOq/5Z8cdskzJujfwqfOTkrwIwj7IRISpnkJnT6SyJ4PCPnGMoFjC9ddhal5KVIYtAt97ix05A==",
-      "peer": true
+      "integrity": "sha512-Tpp60P6IUJDTuOq/5Z8cdskzJujfwqfOTkrwIwj7IRISpnkJnT6SyJ4PCPnGMoFjC9ddhal5KVIYtAt97ix05A=="
     },
     "node_modules/express/node_modules/raw-body": {
       "version": "2.5.3",
       "resolved": "https://registry.npmjs.org/raw-body/-/raw-body-2.5.3.tgz",
       "integrity": "sha512-s4VSOf6yN0rvbRZGxs8Om5CWj6seneMwK3oDb4lWDH0UPhWcxwOWw5+qk24bxq87szX1ydrwylIOp2uG1ojUpA==",
-      "peer": true,
       "dependencies": {
         "bytes": "~3.1.2",
         "http-errors": "~2.0.1",
@@ -5656,7 +5653,6 @@
       "version": "1.6.18",
       "resolved": "https://registry.npmjs.org/type-is/-/type-is-1.6.18.tgz",
       "integrity": "sha512-TkRKr9sUTxEH8MdfuCSP7VizJyzRNMjj2J2do2Jr3Kym598JVdEksuzPQCnlFPW4ky9Q+iA+ma9BGm06XQBy8g==",
-      "peer": true,
       "dependencies": {
         "media-typer": "0.3.0",
         "mime-types": "~2.1.24"
@@ -5879,7 +5875,6 @@
       "version": "0.2.0",
       "resolved": "https://registry.npmjs.org/forwarded/-/forwarded-0.2.0.tgz",
       "integrity": "sha512-buRG0fpBtRHSTCOASe6hD258tEubFoRLb4ZNA6NxMVHNw2gOcwHo9wyablzMzOA5z9xA9L1KNjk/Nt6MT9aYow==",
-      "peer": true,
       "engines": {
         "node": ">= 0.6"
       }
@@ -5888,7 +5883,6 @@
       "version": "0.5.2",
       "resolved": "https://registry.npmjs.org/fresh/-/fresh-0.5.2.tgz",
       "integrity": "sha512-zJ2mQYM18rEFOudeV4GShTGIQ7RbzA7ozbU9I/XBpm7kqgMywgmylMwXHxZJmkVoYkna9d2pVXVXPdYTP9ej8Q==",
-      "peer": true,
       "engines": {
         "node": ">= 0.6"
       }
@@ -6121,6 +6115,7 @@
       "resolved": "https://registry.npmjs.org/graphql/-/graphql-16.12.0.tgz",
       "integrity": "sha512-DKKrynuQRne0PNpEbzuEdHlYOMksHSUI8Zc9Unei5gTsMNA2/vMpoMz/yKba50pejK56qj98qM0SjYxAKi13gQ==",
       "license": "MIT",
+      "peer": true,
       "engines": {
         "node": "^12.22.0 || ^14.16.0 || ^16.0.0 || >=17.0.0"
       }
@@ -6600,7 +6595,6 @@
       "version": "1.9.1",
       "resolved": "https://registry.npmjs.org/ipaddr.js/-/ipaddr.js-1.9.1.tgz",
       "integrity": "sha512-0KI/607xoxSToH7GjN1FfSbLoU0+btTicjsQSWQlh/hZykN8KpmMf7uYwPW3R+akZ6R/w18ZlXSHBYXiYUPO3g==",
-      "peer": true,
       "engines": {
         "node": ">= 0.10"
       }
@@ -6934,6 +6928,7 @@
       "integrity": "sha512-NIy3oAFp9shda19hy4HK0HRTWKtPJmGdnvywu01nOqNC2vZg+Z+fvJDxpMQA88eb2I9EcafcdjYgsDthnYTvGw==",
       "dev": true,
       "license": "MIT",
+      "peer": true,
       "dependencies": {
         "@jest/core": "^29.7.0",
         "@jest/types": "^29.6.3",
@@ -7929,7 +7924,6 @@
       "version": "1.0.3",
       "resolved": "https://registry.npmjs.org/merge-descriptors/-/merge-descriptors-1.0.3.tgz",
       "integrity": "sha512-gaNvAS7TZ897/rVaZ0nMtAyxNyi/pdbjbAwUpFQpN70GqnVfOiXpeUUMKRBmzXaSQ8DdTX4/0ms62r2K+hE6mQ==",
-      "peer": true,
       "funding": {
         "url": "https://github.com/sponsors/sindresorhus"
       }
@@ -7973,7 +7967,6 @@
       "version": "1.1.2",
       "resolved": "https://registry.npmjs.org/methods/-/methods-1.1.2.tgz",
       "integrity": "sha512-iclAHeNqNm68zFtnZ0e+1L2yUIdvzNoauKU4WBA3VvH/vPFieF7qfRlwUZU+DA9P9bPXIS90ulxoUoCH23sV2w==",
-      "peer": true,
       "engines": {
         "node": ">= 0.6"
       }
@@ -7996,7 +7989,6 @@
       "version": "1.6.0",
       "resolved": "https://registry.npmjs.org/mime/-/mime-1.6.0.tgz",
       "integrity": "sha512-x0Vn8spI+wuJ1O6S7gnbaQg8Pxh4NNHb7KSINmEWKiPE4RKOplvijn+NkmYmmRgP68mc70j2EbeTFRsrswaQeg==",
-      "peer": true,
       "bin": {
         "mime": "cli.js"
       },
@@ -8626,8 +8618,7 @@
     "node_modules/path-to-regexp": {
       "version": "0.1.12",
       "resolved": "https://registry.npmjs.org/path-to-regexp/-/path-to-regexp-0.1.12.tgz",
-      "integrity": "sha512-RA1GjUVMnvYFxuqovrEqZoxxW5NUZqbwKtYz/Tt7nXerk0LbLblQmrsgdeOxV5SFHf0UDggjS/bSeOZwt1pmEQ==",
-      "peer": true
+      "integrity": "sha512-RA1GjUVMnvYFxuqovrEqZoxxW5NUZqbwKtYz/Tt7nXerk0LbLblQmrsgdeOxV5SFHf0UDggjS/bSeOZwt1pmEQ=="
     },
     "node_modules/path-type": {
       "version": "4.0.0",
@@ -8747,7 +8738,6 @@
       "version": "2.0.7",
       "resolved": "https://registry.npmjs.org/proxy-addr/-/proxy-addr-2.0.7.tgz",
       "integrity": "sha512-llQsMLSUDUPT44jdrU/O37qlnifitDP+ZwrmmZcoSKyLKvtZxpyV0n2/bD/N4tBAAZ/gJEdZU7KMraoK1+XYAg==",
-      "peer": true,
       "dependencies": {
         "forwarded": "0.2.0",
         "ipaddr.js": "1.9.1"
@@ -8847,7 +8837,6 @@
       "version": "1.2.1",
       "resolved": "https://registry.npmjs.org/range-parser/-/range-parser-1.2.1.tgz",
       "integrity": "sha512-Hrgsx+orqoygnmhFbKaHE6c296J+HTAQXoxEF6gNupROmmGJRoyzfG3ccAveqCBrwr/2yxQ5BVd/GTl5agOwSg==",
-      "peer": true,
       "engines": {
         "node": ">= 0.6"
       }
@@ -9135,7 +9124,6 @@
       "version": "0.19.2",
       "resolved": "https://registry.npmjs.org/send/-/send-0.19.2.tgz",
       "integrity": "sha512-VMbMxbDeehAxpOtWJXlcUS5E8iXh6QmN+BkRX1GARS3wRaXEEgzCcB10gTQazO42tpNIya8xIyNx8fll1OFPrg==",
-      "peer": true,
       "dependencies": {
         "debug": "2.6.9",
         "depd": "2.0.0",
@@ -9159,7 +9147,6 @@
       "version": "2.6.9",
       "resolved": "https://registry.npmjs.org/debug/-/debug-2.6.9.tgz",
       "integrity": "sha512-bC7ElrdJaJnPbAP+1EotYvqZsb3ecl5wi6Bfi6BJTUcNowp6cvspg0jXznRTKDjm/E7AdgFBVeAPVMNcKGsHMA==",
-      "peer": true,
       "dependencies": {
         "ms": "2.0.0"
       }
@@ -9167,8 +9154,7 @@
     "node_modules/send/node_modules/debug/node_modules/ms": {
       "version": "2.0.0",
       "resolved": "https://registry.npmjs.org/ms/-/ms-2.0.0.tgz",
-      "integrity": "sha512-Tpp60P6IUJDTuOq/5Z8cdskzJujfwqfOTkrwIwj7IRISpnkJnT6SyJ4PCPnGMoFjC9ddhal5KVIYtAt97ix05A==",
-      "peer": true
+      "integrity": "sha512-Tpp60P6IUJDTuOq/5Z8cdskzJujfwqfOTkrwIwj7IRISpnkJnT6SyJ4PCPnGMoFjC9ddhal5KVIYtAt97ix05A=="
     },
     "node_modules/sentence-case": {
       "version": "3.0.4",
@@ -9186,7 +9172,6 @@
       "version": "1.16.3",
       "resolved": "https://registry.npmjs.org/serve-static/-/serve-static-1.16.3.tgz",
       "integrity": "sha512-x0RTqQel6g5SY7Lg6ZreMmsOzncHFU7nhnRWkKgWuMTu5NN0DR5oruckMqRvacAN9d5w6ARnRBXl9xhDCgfMeA==",
-      "peer": true,
       "dependencies": {
         "encodeurl": "~2.0.0",
         "escape-html": "~1.0.3",
@@ -9916,6 +9901,7 @@
       "integrity": "sha512-f0FFpIdcHgn8zcPSbf1dRevwt047YMnaiJM3u2w2RewrB+fob/zePZcrOyQoLMMO7aBIddLcQIEK5dYjkLnGrQ==",
       "dev": true,
       "license": "MIT",
+      "peer": true,
       "dependencies": {
         "@cspotcode/source-map-support": "^0.8.0",
         "@tsconfig/node10": "^1.0.7",
@@ -10037,6 +10023,7 @@
       "integrity": "sha512-jl1vZzPDinLr9eUt3J/t7V6FgNEw9QjvBPdysz9KfQDD41fQrC2Y4vKQdiaUpFT4bXlb1RHhLpp8wtm6M5TgSw==",
       "dev": true,
       "license": "Apache-2.0",
+      "peer": true,
       "bin": {
         "tsc": "bin/tsc",
         "tsserver": "bin/tsserver"
@@ -10214,7 +10201,6 @@
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/utils-merge/-/utils-merge-1.0.1.tgz",
       "integrity": "sha512-pMZTvIkT1d+TFGvDOqodOclx0QWkkgi6Tdoa8gC8ffGAAqz9pzPTZWAybbsHHoED/ztMtkv/VoYTYyShUn81hA==",
-      "peer": true,
       "engines": {
         "node": ">= 0.4.0"
       }
@@ -10417,6 +10403,7 @@
       "resolved": "https://registry.npmjs.org/ws/-/ws-8.18.3.tgz",
       "integrity": "sha512-PEIGCY5tSlUt50cqyMXfCzX+oOPqN0vuGqWzbcJ2xvnkzkq46oOpz7dQaTDBdfICb4N14+GARUDw2XV2N4tvzg==",
       "license": "MIT",
+      "peer": true,
       "engines": {
         "node": ">=10.0.0"
       },
diff --git a/package.json b/package.json
index 4110518..2e5ed1a 100644
--- a/package.json
+++ b/package.json
@@ -24,6 +24,7 @@
     "@graphql-tools/schema": "^10.0.30",
     "class-transformer": "^0.5.1",
     "cors": "^2.8.5",
+    "dotenv": "^17.2.3",
     "graphql": "^16.12.0",
     "graphql-scalars": "^1.23.0",
     "graphql-subscriptions": "^3.0.0",
diff --git a/src/api/resolvers.ts b/src/api/resolvers.ts
index da934a8..025a5b8 100644
--- a/src/api/resolvers.ts
+++ b/src/api/resolvers.ts
@@ -58,6 +58,7 @@ import {ZABBIX_EDGE_DEVICE_BASE_GROUP, zabbixAPI} from "../datasources/zabbix-ap
 import {GraphQLInterfaceType, GraphQLList} from "graphql/type/index.js";
 import {isDevice} from "./resolver_helpers.js";
 import {ZabbixPermissionsHelper} from "../datasources/zabbix-permissions.js";
+import {Config} from "../common_utils.js";
 
 
 export function createResolvers(): Resolvers {
@@ -78,7 +79,7 @@ export function createResolvers(): Resolvers {
                 return dataSources.zabbixAPI.getLocations(zabbixAuthToken, new ParsedArgs(args));
             },
             apiVersion: () => {
-                return process.env.API_VERSION ?? "unknown"
+                return Config.API_VERSION ?? "unknown"
             },
             zabbixVersion: async () => {
                 return await new ZabbixRequest<string>("apiinfo.version").executeRequestThrowError(
diff --git a/src/api/schema.ts b/src/api/schema.ts
index c3007b1..cc85528 100644
--- a/src/api/schema.ts
+++ b/src/api/schema.ts
@@ -8,6 +8,7 @@ import {readFileSync} from "fs";
 import {GraphQLSchema} from "graphql/type";
 import {createResolvers} from "./resolvers.js";
 import {readdirSync} from "node:fs";
+import {Config} from "../common_utils.js";
 
 
 const createZabbixHierarchicalDeviceFieldResolver =
@@ -26,15 +27,15 @@ const createZabbixHierarchicalDeviceTagsResolver =
     }
 export async function schema_loader(): Promise<GraphQLSchema> {
     const resolvers = createResolvers();
-    const schemaPath = process.env.SCHEMA_PATH || './schema/';
+    const schemaPath = Config.SCHEMA_PATH || './schema/';
     console.log(`Loading schema from path: ${schemaPath}, cwd=${process.cwd()}`);
     var schemaFiles = readdirSync(schemaPath).filter(fn => fn.endsWith('.graphql'));
     let typeDefs: string = "";
     for (const schemaFile of schemaFiles) {
         typeDefs += readFileSync(schemaPath + schemaFile, {encoding: 'utf-8'});
     }
-    if (process.env.ADDITIONAL_SCHEMAS) {
-        for (const schema of process.env.ADDITIONAL_SCHEMAS.split(",")){
+    if (Config.ADDITIONAL_SCHEMAS) {
+        for (const schema of Config.ADDITIONAL_SCHEMAS.split(",")){
             typeDefs += readFileSync(schema, {encoding: 'utf-8'});
         }
     }
@@ -54,8 +55,8 @@ export async function schema_loader(): Promise<GraphQLSchema> {
         GenericDevice: createZabbixHierarchicalDeviceFieldResolver("GenericDevice", originalSchema, additionalMappings),
         DeviceConfig: createZabbixHierarchicalDeviceTagsResolver("DeviceConfig", originalSchema),
     }
-    if (process.env.ADDITIONAL_RESOLVERS) {
-        for (const resolver of process.env.ADDITIONAL_RESOLVERS.split(",")){
+    if (Config.ADDITIONAL_RESOLVERS) {
+        for (const resolver of Config.ADDITIONAL_RESOLVERS.split(",")){
             genericResolvers[resolver] = createZabbixHierarchicalDeviceFieldResolver(resolver, originalSchema, additionalMappings)
         }
     }
diff --git a/src/common_utils.ts b/src/common_utils.ts
index 6e9d51c..58b75e1 100644
--- a/src/common_utils.ts
+++ b/src/common_utils.ts
@@ -1,8 +1,17 @@
-export function sleep(ms: number): { promise: Promise<void>, cancel: () => void } {
-    let timeoutId: NodeJS.Timeout;
-    const promise = new Promise<void>((resolve) => {
-        timeoutId = setTimeout(resolve, ms);
-    });
-    const cancel = () => clearTimeout(timeoutId);
-    return { promise, cancel };
+import {configDotenv} from "dotenv";
+configDotenv();
+
+export class Config {
+    static readonly ZABBIX_BASE_URL = process.env.ZABBIX_BASE_URL || ""
+static readonly DRY_RUN = process.env.DRY_RUN
+    static readonly API_VERSION = process.env.API_VERSION
+    static readonly SCHEMA_PATH = process.env.SCHEMA_PATH || './schema/'
+    static readonly ADDITIONAL_SCHEMAS = process.env.ADDITIONAL_SCHEMAS
+    static readonly ADDITIONAL_RESOLVERS = process.env.ADDITIONAL_RESOLVERS
+    static readonly ZABBIX_AUTH_TOKEN_FOR_REQUESTS = process.env.ZABBIX_AUTH_TOKEN_FOR_REQUESTS
+    static readonly ZABBIX_AUTH_TOKEN = process.env.ZABBIX_AUTH_TOKEN
+    static readonly ZABBIX_EDGE_DEVICE_BASE_GROUP = process.env.ZABBIX_EDGE_DEVICE_BASE_GROUP
+    static readonly ZABBIX_ROADWORK_BASE_GROUP = process.env.ZABBIX_ROADWORK_BASE_GROUP
+    static readonly ZABBIX_PERMISSION_TEMPLATE_GROUP_NAME_PREFIX = process.env.ZABBIX_PERMISSION_TEMPLATE_GROUP_NAME_PREFIX || "Permissions"
+    static readonly LOG_LEVELS = process.env.LOG_LEVELS
 }
\ No newline at end of file
diff --git a/src/datasources/zabbix-api.ts b/src/datasources/zabbix-api.ts
index 078e671..3d73f62 100644
--- a/src/datasources/zabbix-api.ts
+++ b/src/datasources/zabbix-api.ts
@@ -7,10 +7,11 @@ import {
 } from "@apollo/datasource-rest";
 import {logger} from "../logging/logger.js";
 import {ParsedArgs, ZabbixErrorResult, ZabbixRequest, ZabbixResult} from "./zabbix-request.js";
+import {Config} from "../common_utils.js";
 
-export const zabbixRequestAuthToken = process.env.ZABBIX_AUTH_TOKEN_FOR_REQUESTS
-export const zabbixSuperAuthToken = process.env.ZABBIX_AUTH_TOKEN
-export const ZABBIX_EDGE_DEVICE_BASE_GROUP = process.env.ZABBIX_EDGE_DEVICE_BASE_GROUP || process.env.ZABBIX_ROADWORK_BASE_GROUP || "Roadwork"
+export const zabbixRequestAuthToken = Config.ZABBIX_AUTH_TOKEN_FOR_REQUESTS
+export const zabbixSuperAuthToken = Config.ZABBIX_AUTH_TOKEN
+export const ZABBIX_EDGE_DEVICE_BASE_GROUP = Config.ZABBIX_EDGE_DEVICE_BASE_GROUP || Config.ZABBIX_ROADWORK_BASE_GROUP || "Roadwork"
 export const FIND_ZABBIX_EDGE_DEVICE_BASE_GROUP_PREFIX = new RegExp(`^(${ZABBIX_EDGE_DEVICE_BASE_GROUP})\/`)
 
 export class ZabbixAPI
@@ -103,4 +104,4 @@ export class ZabbixAPI
     }
 }
 
-export const zabbixAPI = new ZabbixAPI(process.env.ZABBIX_BASE_URL || "")
+export const zabbixAPI = new ZabbixAPI(Config.ZABBIX_BASE_URL)
diff --git a/src/datasources/zabbix-permissions.ts b/src/datasources/zabbix-permissions.ts
index c75fce9..ab5dca6 100644
--- a/src/datasources/zabbix-permissions.ts
+++ b/src/datasources/zabbix-permissions.ts
@@ -2,6 +2,7 @@ import {ParsedArgs, ZabbixErrorResult, ZabbixRequest, ZabbixResult} from "./zabb
 import {ZabbixAPI} from "./zabbix-api.js";
 import {InputMaybe, Permission, QueryHasPermissionsArgs, UserPermission} from "../schema/generated/graphql.js";
 import {ApiErrorCode, PermissionNumber} from "../model/model_enum_values.js";
+import {Config} from "../common_utils.js";
 
 
 export class ZabbixRequestWithPermissions<T extends ZabbixResult, A extends ParsedArgs = ParsedArgs> extends ZabbixRequest<T, A> {
@@ -93,7 +94,7 @@ class ZabbixQueryUserGroupPermissionsRequest extends ZabbixRequest<ZabbixUserGro
 
 export class ZabbixPermissionsHelper {
     private static permissionObjectNameCache: Map<string, string | null> = new Map()
-    public static ZABBIX_PERMISSION_TEMPLATE_GROUP_NAME_PREFIX = process.env.ZABBIX_PERMISSION_TEMPLATE_GROUP_NAME_PREFIX || "Permissions"
+    public static ZABBIX_PERMISSION_TEMPLATE_GROUP_NAME_PREFIX = Config.ZABBIX_PERMISSION_TEMPLATE_GROUP_NAME_PREFIX
 
     public static async getUserPermissions(zabbixAPI: ZabbixAPI, zabbixAuthToken?: string, cookie?: string,
                                            objectNames?: InputMaybe<string[]> | undefined): Promise<UserPermission[]> {
diff --git a/src/index.ts b/src/index.ts
index 50bf386..7ae6482 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -1,11 +1,12 @@
 import {startAPi} from "./api/start.js";
 import {logger} from "./logging/logger.js";
+import {Config} from "./common_utils.js";
 
 // Determine and log the operation mode first:
 //  Controller and api share the same code base
 //  but may run independently
 
-if (process.env.DRY_RUN) {
+if (Config.DRY_RUN) {
     logger.info("Dry run mode - exiting directly without starting anything")
     process.exit(0)
 }
diff --git a/src/logging/logger.ts b/src/logging/logger.ts
index 727b6b0..340e669 100644
--- a/src/logging/logger.ts
+++ b/src/logging/logger.ts
@@ -1,3 +1,5 @@
+import {Config} from "../common_utils.js";
+
 export enum Loglevel {
     ERROR="ERROR", WARN="WARN", INFO="INFO", TRACE="TRACE", DEBUG="DEBUG"
 }
@@ -11,7 +13,7 @@ export class Logger {
     }
 
     readEnvironmentLogLevel() {
-        const levels = process.env.LOG_LEVELS
+        const levels = Config.LOG_LEVELS
         if (levels) {
             const enumLevels = levels.split(",").map(v=> Loglevel[v  as keyof typeof Loglevel])
             this.levels = new Set<Loglevel>(enumLevels)