docker-compose.yml

services:
  php:
    image: php:8.1-cli
    working_dir: "/usr/src/myapp"
    volumes:
      - .:/usr/src/myapp

  composer:
    image: composer:latest
    volumes:
      - .:/app

  phpunit:
    image: php:8.1-cli
    working_dir: "/usr/src/myapp"
    volumes_from:
      - php
    entrypoint: "vendor/bin/phpunit"