title: How to shutdown an app deployed on Heroku?
body: <p>I have an app on Heroku which is being used by few users. However, I notice there are some data issues which I'd like to fix and stop the app in the mean time so users don't enter anything new.</p>
  <p>Is there a way to stop the app on Heroku rather than destroying it? I see that restart server command is there... Although I don't see anything like 'stop'.</p>