ci(azure-pipelines): add PROJECT_DIR to env per-task

azure-pipelines.yaml

@@ -85,6 +85,7 @@ jobs:
         HTTP_PROXY: http://proxy.frankfurt-airport.de:8080
         NO_PROXY: 'localhost,127.0.0.1,*.docker.internal,*.azmk8s.io,devfra.azurecr.io,devfra.westeurope.data.azurecr.io'
         FRAPORT_NOPROXY: 'dev.azure.com,*.dev.azure.com,*.fraport.de,*.frankfurt-airport.de'
+        PROJECT_DIR: $(Build.Repository.LocalPath)
       inputs:
         targetType: inline
         script: |
@@ -97,6 +98,8 @@ jobs:
     - task: Bash@3
       name: frontendCompile
       displayName: Compile frontend
+      env:
+        PROJECT_DIR: $(Build.Repository.LocalPath)
       inputs:
         targetType: inline
         script: |