title: How do I set up a Sinatra app under Apache with Passenger?
body: <p>Let's say I have the simplest single-file Sinatra app. The <a href="http://www.sinatrarb.com/" rel="nofollow noreferrer">hello world</a> on their homepage will do. I want to run it under Apache with Phusion Passenger, AKA mod_rails.</p>
  
  <ul>
  <li>What directory structure do I need?</li>
  <li>What do I have to put in the vhost conf file?</li>
  <li>I understand I need a rackup file. What goes in it and why?</li>
  </ul>