Docker Compose - Wordpress Existing Basic with .ENV file

docker-compose.yml

version: "3"
volumes:
  wp-db-data:
services:
  wp-db:
    image: mysql:5.7
    container_name: ww-mysql
    # Load environment variables
    env_file: .env
    volumes:
      # Data persistence
      - wp-db-data:/var/lib/mysql
    ports:
      # For external access
      - 3306:3306
    environment:
      # Load DB data from env file
      MYSQL_ROOT_PASSWORD: ${DB_PASSWORD}
      MYSQL_DATABASE: ${DB_NAME}
      MYSQL_USER: ${DB_USER}
      MYSQL_PASSWORD: ${DB_PASSWORD}
    # More upload size and avoiding common MySQL issues
    command: --max_allowed_packet=8M --sql_mode=""

  wp-app:
    # Load latest wordpress image
    image: wordpress:latest
    container_name: ww-app
    # Load environment variables
    env_file: .env
    volumes:
      # Mount current existing Wordpress site in public folder
      - .:/var/www/html
    depends_on:
      # Connect with DB container
      - wp-db
    ports:
      # Expose port
      - "80:80"
    restart: always
    environment:
      # DB connection info from environment variables
      WORDPRESS_DB_HOST: wp-db:3306
      WORDPRESS_DB_NAME: ${DB_NAME}
      WORDPRESS_DB_USER: ${DB_USER}
      WORDPRESS_DB_PASSWORD: ${DB_PASSWORD}