title: Cannot open application via heroku (Using Ruby on Rails By Micheal Hartl, Ch 2)
body: <p>I have finished an application in Rails and trying to deploy on heroku, but facing an error that says: <strong>The page you were looking for doesn't exist.</strong></p>
  
  <p>The app runs locally though. I have also updated database and running heroku status says:</p>
  
  <pre><code>Production:   No known issues at this time.
  Development:  No known issues at this time.
  </code></pre>