title: Is it possible to route heroku-rails-app to a subdirectory of my custom domain?
body: <p>I want to setup a rails app on heroku that is part of a website.
  The website which is hosted on a different server explains the usage of the app, shows a tour, plans, contains a blog on related stuff and so on.</p>
  
  <p>I want to route to <strong>my_domain/app</strong> and the app should respond to that url. The custom_domain add-on doesnt allow to enter directories.</p>
  
  <p>How can I configure that or how would you realize that scenario? </p>