title: Understanding architecture and folder structure in Symfony2?
body: <p>I'm completely new to Symfony 2 and i can't really understand the folder structure and organization of a project. I know what a <strong>bundle</strong> is, but what is unclear to me is:</p>
  
  <ul>
  <li>what's the <strong>main directory</strong> (the directory to be copied on the web server for deployment)</li>
  <li>where <strong>assets</strong> (css, javascript) should be placed</li>
  <li>if (and how) environment should be changed when publishing my website</li>
  </ul>
  
  <p>I've already read the book on Symfony website and i can't find those answers.</p>