version: "2"
services:

    db:
        image: postgres
        volumes:
            - db_data:/var/lib/postgresql/data
            - ./backup:/backup
        ports:
            - "8001:5432"
        environment:
            - POSTGRES_DB=happyherbivore
            - POSTGRES_USER=admin
            - POSTGRES_PASSWORD=password

    app:
        dns: 8.8.8.8
        ports:
            - "8000:8000"
        build: .
        environment:
            DB_HOST: db
            DB_USER: admin
            DB_PASS: password
            DB_NAME: happyherbivore

            ALL-YOUR-SETTINGS
        volumes:
            - .:/app
        command: python manage.py runserver_plus 0.0.0.0:8000

volumes:
    db_data: