docker-compose file for Wordpress + mysql database

docker-compose.yml

version: '3'

services:
  wordpress:
    image: wordpress:php7.1-apache
    container_name: example.com
    restart: always
    volumes:
      - ./wp-content/:/var/www/html/wp-content
    environment:
      # Wordpress
      - WORDPRESS_DB_PASSWORD=12345
    networks:
      - default
      - proxy-tier

  mysql:
    image: mariadb
    restart: always
    volumes:
      - ./datadir:/var/lib/mysql
    environment:
      - MYSQL_ROOT_PASSWORD=12345
    networks:
      - default

# Use an existing network
networks:
  proxy-tier:
    external:
      name: www-network