version: '3'

    services:
      working-db:
        image: mariadb:latest
        container_name: scratch-mariadb
        volumes:
          - container-volume:/var/lib/mysql
        environment:
          MYSQL_ROOT_PASSWORD: root
          MYSQL_DATABASE: unclean
        ports:
          - '3306:3306'

    volumes:
      container-volume: