title: Path to private assets on Ruby on Rails
body: <p>I have a PEM file that should be stored somewhere in my Ruby on Rails web app, and be referenced from the <code>production.rb</code> config file with the path, as per below.</p>
  
  <p><code>APNS.pem  = '/path/to/pem/file</code>'</p>
  
  <p>I want to keep this file private, so storing it in the assets folder is not a good idea. Where can I safely store it and what would be the path like?</p>