title: How to server multiple sites with nginx/passenger?
body: <p>I have different websites/applications built with rails, which has different domain names. The thing is I want to serve them from a server with Nginx/passenger. I tried some techniques, but I cannot make them work, basically, I have very few information about this.</p>
  
  <p>So, I can serve different websites/applications on different ports. But how can I make people to see application "AAA" if they are coming from aaa.com and see application "BBB" if they are coming from bbb.com?</p>