Wordpress stack composer file for shared database

version: "2.1"
# Creates WordPress container and links to db container via user-defined network mysql-net
# Video at https://www.youtube.com/watch?v=NdwB5TPXCnQ explains the file
services:
  wordpress:
    image: wordpress:latest
    container_name: wordpress
    hostname: wordpress
    restart: always
    # Connect to the database container's network
    networks:
      - mysql-net
    ports:
      # Exposes an external port 8080 to an internal container port 80
      - 8080:80
    environment:
      # This variable points this container to the container called db for database
      WORDPRESS_DB_HOST: db
      # Root user so we don't have to add a new user for each service to database
      # (but you can name one with own password, just don't forget to create user in database before running the container)
      WORDPRESS_DB_USER: root
      # Database user's password (if not root user, then set for user)
      WORDPRESS_DB_PASSWORD: dbrootpassword
      # Just make sure you create an empty database in MariaDB with this name first before spinning up this stack
      WORDPRESS_DB_NAME: wordpress
    volumes:
      # Sets a persistent volume called wordpress which maps inside the container as /var/www/html
      - wordpress:/var/www/html

volumes:
  # Create volume called wordpress for persistent storage
  wordpress:
    # Specify name so it does not append stack name and become wordpress_wordpress
    name: wordpress
networks:
  mysql-net:
    # Joins existing network of this name (it was created by db container)
    external: true
    # Specify name so that it does not append stack name
    name: mysql-net