fix: docker build 8.9 image

Author: monavari-lebrecht

.github/workflows/webapp-e2e-tests-on-demand.yml

@@ -86,6 +86,15 @@ jobs:
               exit 1
             fi
           fi
+
+          # Non-standalone setups (8.8/8.9) require DATABASE for compose interpolation.
+          if [[ "${{ matrix.non_standalone }}" != "true" ]]; then
+            echo "DATABASE=elasticsearch" >> "$GITHUB_ENV"
+            if [[ -f "$GITHUB_WORKSPACE/${{ matrix.config_path }}/.env" ]] && ! grep -q '^DATABASE=' "$GITHUB_WORKSPACE/${{ matrix.config_path }}/.env"; then
+              echo "DATABASE=elasticsearch" >> "$GITHUB_WORKSPACE/${{ matrix.config_path }}/.env"
+            fi
+          fi
+
           echo "ENV_FILE_ABS=$ENV_FILE_ABS" >> "$GITHUB_ENV"
           echo "ENV_FILE_REL=$ENV_FILE_REL" >> "$GITHUB_ENV"
           # Filter out comments and empty lines before adding to GITHUB_ENV
@@ -127,19 +136,20 @@ jobs:
             docker compose --env-file "$ENV_FILE_REL" up -d 
           else
             echo "Using standalone camunda container"
+            export DATABASE="${DATABASE:-elasticsearch}"
             if [[ "${{ matrix.tasklist_mode }}" == "v1" ]]; then
               echo "Starting with Tasklist V1 mode enabled"
               CAMUNDA_TASKLIST_V2_MODE_ENABLED=false \
               CAMUNDA_SECURITY_AUTHENTICATION_UNPROTECTEDAPI=true \
               CAMUNDA_SECURITY_AUTHORIZATIONS_ENABLED=false \
               CAMUNDA_SECURITY_AUTHENTICATION_METHOD=NONE \
-              DATABASE=elasticsearch docker compose up -d camunda
+              docker compose up -d camunda
             else
               echo "Starting with default Tasklist V2 mode"
               CAMUNDA_SECURITY_AUTHENTICATION_UNPROTECTEDAPI=true \
               CAMUNDA_SECURITY_AUTHORIZATIONS_ENABLED=false \
               CAMUNDA_SECURITY_AUTHENTICATION_METHOD=NONE \
-              DATABASE=elasticsearch docker compose up -d camunda
+              docker compose up -d camunda
             fi
           fi
         working-directory: ${{ env.CONFIG_PATH }}