feat: Add Varnish backend health check to deploy workflow and set APP_VERSION in Varnish service.

.gitea/workflows/deploy.yml

@@ -409,6 +409,15 @@ jobs:
               docker compose -p "$PROJECT_NAME" --env-file "$ENV_FILE" logs --tail=150
               exit 1
             fi
+            
+            echo "→ Verifying Varnish Backend Health..."
+            docker compose -p "$PROJECT_NAME" --env-file "$ENV_FILE" exec -T varnish varnishadm backend.list
+            if ! docker compose -p "$PROJECT_NAME" --env-file "$ENV_FILE" exec -T varnish varnishadm backend.list | grep -q "healthy"; then
+              echo "❌ Fehler: Varnish Backend ist SICK!"
+              docker compose -p "$PROJECT_NAME" --env-file "$ENV_FILE" logs varnish
+              exit 1
+            fi
+            echo "✅ Varnish Backend ist Healthy."
 
   # ──────────────────────────────────────────────────────────────────────────────
   # JOB 5: PageSpeed Test

docker-compose.yml

@@ -21,6 +21,7 @@ services:
       - /var/lib/varnish:exec,mode=1777
     environment:
       VARNISH_SIZE: ${VARNISH_CACHE_SIZE:-256M}
+      APP_VERSION: ${IMAGE_TAG:-latest}
     labels:
       - "traefik.enable=true"
       # HTTP ⇒ HTTPS redirect