petclinic_symfony doc https://symfony.com/doc/5.4/index.html https://symfony.com/doc/5.4/the-fast-track/en/index.html conf https://symfony.com/doc/current/setup/web_server_configuration.html https://symfony.com/doc/current/setup.html work https://symfony.com/doc/current/page_creation.html https://symfony.com/doc/5.4/components/uid.html#installation