version: '3.1'

volumes:
  database_data:
    driver: local

services:
  db:
    image: postgres:latest
    restart: always
    environment:
      POSTGRES_DB: exampledb
      POSTGRES_USER: john
      POSTGRES_PASSWORD: 123456
    ports:
      - 5432:5432
    volumes:
      - database_data:/var/lib/postgresql/data

  api:
    build:
      context: .
      dockerfile: Dockerfile.dev
    environment:
     - DB_HOST=db
    expose:
      - 4000
    ports:
      - 4000:4000
    volumes:
      - ./:/app
    links:
      - db