I'm starting out with Symfony 4 following this guide https://symfony.com/doc/current/setup.html, so I have executed one after the other these commands:

1. composer create-project symfony/website-skeleton my-project
2. cd my-project
3. composer require server --dev
4. php bin/console server:run

but when I browse to http://localhost:8000 I get a No route found for "GET /" error.