title: How run Javascript on server side in Ruby on Rails
body: <p>I intend to program a Bitcoin related Web application with Ruby on Rails. 
  Now there are some very useful libraries out there like Bitcoinjs or Bitcore that are written in Javascript and can be run on the client side in the Webbrowser, or server side with Node.js. However, since I intend to program this application with RoR, I wonder how I can take advantage of those libraries on the server side.
  Is there a way (i.e. a gem) that allows interpreting Javascript on the server or can I start a Node.js instance in my RoR code by which I can then interpret those javascript libraries and execute their functions?
  Any help is greatly appreciated.</p>