title: Heroku Server not working with Devise
body: <p>I have a rails app that uses Devise for user auth. In localhost:3000 my site works perfectly. I can signup, login, etc. However, when I <code>git push heroku</code> and try going to sign up or login, I just get a 500 error.</p>
  
  <p>Some specs of my site: I'm using sqlite (I heard that may be a problem) and have changed the <strong>/users/sign_up</strong> route to <strong>/sign</strong> and <strong>/users/sign_in</strong> route to <strong>/login</strong>. My <strong>/configure/environments/development.rb</strong> has the code <code>config.action_mailer.default_url_options = { :host =&gt; 'localhost:3000' }</code> and <strong>/configure/environments/production.rb</strong> has the code <code>config.action_mailer.default_url_options = { :host =&gt; 'myPersonalApp.heroku.com' }</code></p>
  
  <p>What is wrong that is causing the 500 error only on heroku?</p>