add job build-frontend

.gitlab-ci.yml

@@ -38,9 +38,12 @@ build_frontend:
   image: node:18
   dependencies:
     - check_app_update
-  rules:
-    - if: '$NEW_COMMIT == "true"'
   script:
+    - source variables.env || true
+    - if [ "$NEW_COMMIT" != "true" ]; then
+      echo "No new commit, skipping build";
+      exit 0;
+      fi
     - cd doodlestudent/front
     - npm ci
     - npm run build --prod