chore: 注释掉Docker Compose中的端口映射

- 在docker-compose.yml中注释掉Postgres和Redis服务的端口映射，以限制对宿主机的访问，仅允许在Docker网络内部访问。

api/docker-compose.yml

@@ -5,8 +5,8 @@ services:
   postgres:
     image: postgres:17-alpine
     container_name: life-echo-postgres
-    ports:
-      - "5432:5432"
+    # ports:
+    #   - "5432:5432"  # 不暴露到宿主机，仅在 Docker 网络内部访问
     environment:
       POSTGRES_USER: ${POSTGRES_USER:-postgres}
       POSTGRES_PASSWORD: ${POSTGRES_PASSWORD:-postgres}
@@ -31,8 +31,8 @@ services:
   redis:
     image: redis:7-alpine
     container_name: life-echo-redis
-    ports:
-      - "6379:6379"
+    # ports:
+    #   - "6379:6379"  # 不暴露到宿主机，仅在 Docker 网络内部访问
     volumes:
       - redis_data:/data
     command: redis-server --appendonly yes --maxmemory 256mb --maxmemory-policy allkeys-lru