version: '3.8'

services:
  app:
    build:
      context: .
    ports:
      - '${APP_PORT}:${APP_PORT}'
    depends_on:
      - db
    env_file:
      - .env
    environment: 
      DB_HOST: db
    networks:
      - backend

  db:
    image: postgres:13-alpine
    restart: always
    environment:
      POSTGRES_USER: ${DB_USERNAME}
      POSTGRES_PASSWORD: ${DB_PASSWORD}
      POSTGRES_DB: ${DB_NAME}
    ports:
      - '${DB_PORT}:5432'
    volumes:
      - db-data:/var/lib/postgresql/data
    networks:
      - backend

volumes:
  db-data:

networks:
  backend: