Add phpMyAdmin Container

volumes:
  # Append
  pma-session-store:

services:
  # Append
  pma:
    image: phpmyadmin/phpmyadmin
    environment:
      - PMA_HOST=db
      - PMA_USER=root
      - PMA_PASSWORD=secret
    ports:
      - 8080:80
    volumes:
      - pma-session-store:/sessions

$ docker compose up -d