title: Does Heroku support ActionController::Live?
body: <p>I have a Rails app hosted on Heroku and I want to add Server Sent Events functionalities, but I can't find any documentation or blog post specific for Heroku.</p>
  
  <p>As not all servers (e.g. WEBrick) support ActionController::Live I was wondering what is the default server on Heroku and whether is possible to configure the environment (i.e. change server) to support SSEs.</p>
  
  <p>Any further advice about the server to use and how to configure would be greatly appreciated.</p>