title: How can I find app/AppKernel.php in Symfony 4?
body: <p>I want to register a bundle in the AppKernel Class in Symfony 4 according to this tutorial:</p>
  
  <p><a href="https://symfony.com/doc/3.3/bundles.html" rel="noreferrer">https://symfony.com/doc/3.3/bundles.html</a></p>
  
  <p>But I do not find a folder "app", and also not the file AppKernel.php, so not the class AppKernel. Did I made a mistake by the Symfony installation or do I need to create an app folder by myself?</p>