Docker compose with mount volumes

version: '3.2'

services:

  portal:

    image: 'kontr2/portal'

    ports:

      - "8000:8000"

  db:

    image: postgres:latest

    restart: always

    container_name: postgres

    environment:

      POSTGRES_PASSWORD: TestPass.42

    volumes:

      - type: volume

        source: db_data

        target: /var/lib/postgresql/data

volumes:

  db_data:

version: '3.2'

services:

  portal:

    image: 'kontr2/portal'

    ports:

      - "8000:8000"

  db:

    image: postgres:latest

    restart: always

    container_name: postgres

    environment:

      POSTGRES_PASSWORD: TestPass.42

    volumes:

      - type: volume

        source: db_data

        target: /var/lib/postgresql/data

volumes:

  db_data: