A example for generate a complete stack web which consist in reverse nginx proxy,webserver, mysql database & phpmyadmin, all with docker-compose

docker-compose.yml

version : '3'

services:
  mysql: # Up the database
    image: mariadb:5.5
    container_name: mysql
    environment:
      MYSQL_USER: user
      MYSQL_PASSWORD: user
      MYSQL_ROOT_PASSWORD: root
      MYSQL_DATABASE: default_schema
    volumes:
      - ./data/db:/var/lib/mysql # Make all data generate from database persistent in our machine (host machine)
  phpmyadmin:
    image: phpmyadmin/phpmyadmin
    container_name: phpmyadmin
    links:
      - mysql # Connect this container with mysql container
    environment:
      PMA_HOST: mysql 
      PMA_PORT: 3306
      PMA_ARBITRARY: 1
      VIRTUAL_HOST: phpmyadmin.local.com
    restart: always
    ports:
      - 80
  web:
    image: php:7.2-apache
    container_name: web
    links:
      - mysql
    volumes:
      - ./web-files:/var/www/html/
    ports:
      - 80
    environment:
      - VIRTUAL_HOST=web.local.com # Enable the domain for this container (add in your /etc/hosts the domain pointing to local ip 127.0.0.1)
  web2:
    image: php:7.2-apache
    container_name: web2
    volumes:
      - ./web2-files:/var/www/html/
    ports:
      - 80
    environment:
      - VIRTUAL_HOST=web2.local.com # Enable the domain for this container (add in your /etc/hosts the domain pointing to local ip 127.0.0.1)
  nginx-proxy:
    image: jwilder/nginx-proxy
    ports:
      - "80:80"
    volumes:
      - /var/run/docker.sock:/tmp/docker.sock:ro