MySQL Database + PhpMyAdmin using env file Docker-Compose

database.env

MYSQL_ROOT_PASSWORD=
MYSQL_USER=
MYSQL_PASSWORD=
MYSQL_DATABASE=

docker-compose.yml

version: '3.9'

# Usage:
  ## Start up all services:
    ### docker-compose -f docker/docker-compose.yml up -d
      ## -f flag to specify the filename if filename is not docker-compose.yml or if it's not located in the current directory.
      ## -d flag is used to detach the container's output from the terminal so you can keep using the same terminal.
  ## Shutdown all services:
    ### docker-compose -f docker/docker-compose.yml down
      ## -f flag to specify the filename if filename is not docker-compose.yml or if it's not located in the current directory.
services:
  # BACKUP MYSQL by generating dump file
    # docker exec CONTAINER-NAME mysqldump -u root --password=root DATABASE-NAME > backup.sql
  # RESTORE MYSQL from dump file
    # docker exec -i CONTAINER-NAME mysql -u root --password=root DATABASE-NAME < backup.sql
  db-node:
    container_name: db-node
    image: mysql:5.7
    restart: always
    command:
      --default-authentication-plugin=mysql_native_password
    env_file:
      - database.env
    ports:
      - target: 3306
        published: 3306
        protocol: tcp
        mode: host

  phpmyadmin-node:
    depends_on:
      - db-node
    container_name: phpmyadmin-node
    image: phpmyadmin/phpmyadmin:5.0.0
    restart: always
    env_file:
      - database.env
      - phpmyadmin.env
    ports:
      - target: 80
        published: 8080
        protocol: tcp
        mode: host

  # adminer-node:
  #   container_name: adminer-node
  #   image: adminer
  #   restart: always
  #   ports:
  #     - target: 8080
  #       published: 8080
  #       protocol: tcp
  #       mode: host

    # MYSQL ENVIRONMENT
    # environment:
    #   MYSQL_ROOT_PASSWORD:
    #   MYSQL_USER:
    #   MYSQL_PASSWORD:
    #   MYSQL_DATABASE:

    # PHPMYADMIN ENVIRONMENT
    # environment:
    #   PMA_HOST:
    #   PMA_PORT:
    #   MYSQL_ROOT_PASSWORD:

phpmyadmin.env

PMA_HOST=
PMA_PORT=