docker编写中如何连接到具体数据库

我有下一个设置 docker-compose.yaml

name: test-app-to-delete

services:
  mongo:
    image: mongo
    restart: always
    networks:
      - mongo
    volumes:
      - db:/data/db:rw
    environment:
      MONGO_INITDB_ROOT_USERNAME: 'user'
      MONGO_INITDB_ROOT_PASSWORD: 'password'
      MONGO_INITDB_DATABASE: 'db-name'

  mongo-express:
    image: mongo-express
    restart: always
    networks:
      - mongo
    ports:
      - 8081:8081
    environment:
      ME_CONFIG_MONGODB_ADMINUSERNAME: user
      ME_CONFIG_MONGODB_ADMINPASSWORD: password
      ME_CONFIG_MONGODB_URL: mongodb://user:password@mongo:27017/db-name

networks:
  mongo:

volumes:
  db:

所以当我添加时,问题就成了问题 db-name 到这种配置。

错误:

Could not connect to database using connectionString: 
mongodb://user:password@mongo:27017/db-name

只需注意:我在运行此配置之前重新创建了数据库,所以问题不在缓存数据中。