Docker Compose でサービスを起動
$ ls
compose.yaml docker index.php
$ docker compose up --build
=> => naming to docker.io/library/hands-on-7-db
=> => naming to docker.io/library/hands-on-7-php
✔ Network hands-on-7_default Created
✔ Container hands-on-7-php-1 Created
✔ Container hands-on-7-db-1 Created