fix:优化docker构建速度

docker-compose.yml

@@ -10,14 +10,23 @@ services:
       MONGO_INITDB_DATABASE: ai-bill
     volumes:
       - mongo-data:/data/db
+    healthcheck:
+      test: ["CMD-SHELL", "mongosh --quiet --eval 'db.runCommand({ ping: 1 }).ok' | grep 1"]
+      interval: 10s
+      timeout: 5s
+      retries: 10
 
   backend:
     build:
       context: .
       dockerfile: Dockerfile
+      args:
+        # 可根据网络情况切换为国内镜像源
+        NPM_REGISTRY: ${NPM_REGISTRY:-https://registry.npmjs.org/}
     container_name: ai-bill-backend
     depends_on:
-      - mongo
+      mongo:
+        condition: service_healthy
     environment:
       NODE_ENV: production
       HOST: 0.0.0.0
@@ -30,8 +39,10 @@ services:
     ports:
       - "4010:4000"
     restart: unless-stopped
+    stop_signal: SIGTERM
+    stop_grace_period: 20s
     healthcheck:
-      test: ["CMD", "curl", "-f", "http://localhost:4000/api/health"]
+      test: ["CMD", "node", "-e", "fetch('http://localhost:4000/api/health').then(r=>process.exit(r.ok?0:1)).catch(()=>process.exit(1))"]
       interval: 30s
       timeout: 5s
       retries: 5