add npm dalam docker

docker-compose.prod.yml

@@ -39,6 +39,17 @@ services:
       - ./docker/nginx/default.conf:/etc/nginx/conf.d/default.conf:ro
       - storage_data:/var/www/storage:ro
 
+  # ── Node.js Asset Builder (one-time, run manually) ────────────────────────
+  node-build:
+    image: node:lts-alpine
+    container_name: ecert_node_build
+    working_dir: /app
+    volumes:
+      - ./src:/app
+    command: sh -c "npm ci && npm run build"
+    profiles:
+      - build
+
   # ── Queue Worker (production) ──────────────────────────────────────────────
   queue:
     container_name: ecert_queue