docker-compose.yaml

version: '3.9'

services:
  bot:
    # Name of the Container (by default the 'services' name)
    container_name: 'confusing-bot'

    # Build 'backend' Container using the 'Dockerfile'
    build: .

    # Always restart the Container (in the case of a crash or a system reboot
    restart: always

    # Only starting this Container once the 'db' service finished starting up
    depends_on:
      - db

    # Environment Variables
    env_file:
      - .env.local

  db:
    # Name of the Container (by default the 'services' name)
    # Can be used to connect to this container from another container
    container_name: 'confusing-db'

    # Official Postgres image (Blueprint for Container) from DockerHub
    image: 'postgres:latest'

    # Always restart the Container (in the case of a crash or a system reboot
    restart: always

    # By default, a Postgres database is running on the 5432 port.
    # If we want to access the database from outside the Container (e.g. from a local computer),
    # we need to tell our computer which port of the Container to connect to,
    # in order to access the database in the Container.
    # The syntax to do so is [port we need to connect to externally]:[port we want to retrieve in the container]
    # https://docs.docker.com/compose/networking/
    ports:
      - '5401:5432'

    # The `volumes` tag allows us to share a folder with our Container.
    # Its syntax is as follows: [folder path on our machine]:[folder path to retrieve in the container]
    volumes:
      # Here, we share the folder `.volumes/db-data` in our root repository, with the default PostgreSQL data path.
      # It means that every time the repository is modifying the data inside
      # of `/var/lib/postgresql/data/`, automatically the change will appear in `db-data`.
      - './.volumes/db-data:/var/lib/postgresql/data'

    # Environment Variables
    environment:
      POSTGRES_USER: 'postgres' # The PostgreSQL user (useful to connect to the database)
      POSTGRES_PASSWORD: 'postgres' # The PostgreSQL password (useful to connect to the database)
      POSTGRES_DB: 'confusing_bot' # The PostgreSQL default database (automatically created at first launch)