services:
  app:                    # The name of the service, can be anything
    image: devcon-backend # Declares which image to use
    build: .              # Declares where to build if image is not found
    ports:                # Declares the ports to publish
      - 3000:3000
  mongo:
    image: mongo
    ports:
     - 3456:27017
    environment:
      MONGO_INITDB_ROOT_USERNAME: root
      MONGO_INITDB_ROOT_PASSWORD: example
      MONGO_INITDB_DATABASE: the_database
    volumes:
      - ./mongo/mongo-init.js:/docker-entrypoint-initdb.d/mongo-init.js
      - mongo_data:/data/db

volumes:  
  mongo_data: