title: Omniauth Facebook authentication on localhost
body: <p>I am trying to set up Omniauth as described in this <a href="http://railscasts.com/episodes/236-omniauth-part-2" rel="noreferrer">Railscast</a>. While it works with Twitter, I am unable to get it working with Facebook. I also set up '<a href="http://localhost:3000" rel="noreferrer">http://localhost:3000</a>' as siteurl and 'localhost' as domain but still see the following error message in the browser:</p>
  
  <pre><code>Invalid redirect_uri: Given URL is not allowed by the Application configuration.
  </code></pre>
  
  <p>Does anyone of you have any suggestions on how to fix this? Thanks in advance.</p>