docker-compose.yml

version: "3"
services:
  web-server:
    build: .
    depends_on:
      - db
    environment:
      - DB_HOST=db
      - WEB_SERVER_HOST=0.0.0.0
    deploy:
      replicas: 1
      restart_policy:
        condition: on-failure
    ports:
      #This is a default port mapping. In production you might want to use 80:8080,
      - "8888:8888"
    networks:
      - emission
    volumes:
      - saved-notebooks:/usr/src/app/saved-notebooks
  db:
    image: mongo:3.4
    deploy:
      replicas: 1
      restart_policy:
        condition: on-failure
    ports:
      #This port binding allows you to access the database server outside the host machine. Remove this is you don't need this
      #functionality
      - "27017:27017"

    #Volumes is the preferred way to persist data generated by a container. In this case we use a volume to persist the contents
    #of the data base. Learn more about how to use volumes here: https://docs.docker.com/storage/volumes/
    # And learn how to configure volumes in your compose file here: https://docs.docker.com/compose/compose-file/#volume-configuration-reference
    volumes:
      - mongo-data:/data/db
    networks:
       - emission

networks:
  emission:

volumes:
  mongo-data:
  saved-notebooks: