docker-compose.yml

version: '3.8'
services:
  # These are the configurations for our React app
  # When Docker Compose starts this container it will automatically
  # use the Dockerfile in the directory to configure it
  my-app-frontend:
    build: ./frontend
    volumes:
      - my-app:/home/app
    container_name: my-app-frontend
    networks:
      - my-app-network
    ports:
      - 3000:3000
    # Needed to keep the container from exiting
    stdin_open: true

  # These are the configurations for our Node app
  # When Docker Compose starts this container it will automatically
  # use the Dockerfile in the directory to configure it.
  # Note the `my-app-backend` name is important, in our React app, when we
  # refer to `"proxy": "http://my-app-backend:8080"` in package.json, that
  # value is mapped on the network to the address and port of this container.
  my-app-backend:
    depends_on:
      - my-app-db
    build: ./backend
    volumes:
      - my-app:/home/app
    container_name: my-app-backend
    networks:
      - my-app-network
    ports:
      - 8080:8080

  # This is the configuration for our PostgreSQL database container
  # Note the `my-app-db` name is important; in our Node app when we refer
  # to `host: 'my-app-db'` in server.js, that value is mapped on the
  # network to the address of this container.
  my-app-db:
    image: postgres:14-alpine
    restart: always
    environment:
      POSTGRES_USER: example
      POSTGRES_PASSWORD: example
      POSTGRES_DB: mydb
    volumes:
      - postgresdata:/var/lib/postgresql/data
    container_name: my-app-db
    networks:
      - my-app-network
    ports:
      - 5432:5432

volumes:
  my-app:
    external: true
  postgresdata:

networks:
  my-app-network:
    external: true