docker-compose.yml

version: '3.8'

# The services that make up your app are defined in this section
services:
  # The database service
  db:
    # The Docker image to use for the database service
    image: 'postgres:15.2-alpine'
    # The environment variables for the database service
    environment:
        - POSTGRES_DB=${DB_NAME}
        - POSTGRES_USER=${DB_USERNAME}
        - POSTGRES_PASSWORD=${DB_PASSWORD}
    # The ports to expose for the database service
    ports:
      - "5432:5432"
    # The volumes to mount for the database service
    volumes:
      - db-data:/var/lib/postgresql/data
    # The networks to connect to for the database service
    networks:
      - backend
    # The healthcheck to use for the database service
    healthcheck:
      test: [ "CMD-SHELL", "pg_isready --dbname=${DB_NAME} --username=${DB_USERNAME}" ]
      interval: 10s
      timeout: 5s
      retries: 5
    # The restart policy for the database service
    restart: unless-stopped

  # The app service
  app:
    # The Docker image to use for the app service
    image: 'minimal-jpa:latest'
    # The build context for the app service
    build: .
    # The services that the app service depends on
    depends_on:
      db:
        condition: service_healthy
    # The environment variables for the app service
    environment:
      - DB_NAME=${DB_NAME}
      - DB_URL=${DB_URL}
      - DB_USERNAME=${DB_USERNAME}
      - DB_PASSWORD=${DB_PASSWORD}
    # The networks to connect to for the app service
    networks:
      - frontend
      - backend

# The volumes to define for your app
volumes:
  db-data:

# The networks to define for your app
networks:
  frontend:
  backend: