version: '3'
services:
    apache:
        build: .docker/apache
        container_name: sf4_apache
        ports:
          - 80:80
        volumes:
          - .docker/config/vhosts:/etc/apache2/sites-enabled
          - .:/home/wwwroot/sf4
        depends_on:
          - php

    mysql:
        image: mysql
        container_name: sf4_mysql
        volumes:
            - .docker/data/db:/var/lib/mysql
        environment:
            MYSQL_ROOT_PASSWORD: root
            MYSQL_DATABASE: sf4
            MYSQL_USER: sf4
            MYSQL_PASSWORD: sf4

    php:
        build: .docker/php
        container_name: sf4_php
        volumes:
          - .:/home/wwwroot/sf4
        environment:
          - maildev_host=sf4_maildev
        depends_on:
          - maildev
          - mysql

    phpmyadmin:
        image: phpmyadmin/phpmyadmin
        container_name: sf4_phpmyadmin
        ports:
            - 8080:80
        links:
            - mysql

    maildev:
        image: djfarrelly/maildev
        container_name: sf4_maildev
        ports:
          - 8001:80

sudo docker-compose up -d
Creating network "dcprisonsystemcom_default" with the default driver
Creating sf4_maildev ...
Creating sf4_mysql ...
Creating sf4_maildev
Creating sf4_mysql ... done  // so here we can see that it has created the sf4_mysql container
Creating sf4_phpmyadmin ...
Creating sf4_maildev ... done
Creating sf4_php ...
Creating sf4_php ... done
Creating sf4_apache ...
Creating sf4_apache ... done

sudo docker container ls
CONTAINER ID        IMAGE                      PORTS                            NAMES
2abe4a7b1932        dcprisonsystemcom_apache   0.0.0.0:80->80/tcp, 443/tcp      sf4_apache
80cfd1c4b342        dcprisonsystemcom_php      9000/tcp                         sf4_php
b59185fdbaa0        phpmyadmin/phpmyadmin      9000/tcp, 0.0.0.0:8080->80/tcp   sf4_phpmyadmin
6482de0c7dc9        djfarrelly/maildev         25/tcp, 0.0.0.0:8001->80/tcp     sf4_maildev