Rails 5.0
Rails 5.0 include an option for an API-only application suitable for use as a backend to JavaScript.
Rails 5.0 will only work with Ruby 2.2.2 or better.
This guide shows how to install the pre-release version of Rails 5.0.
gem install rails --version=5.0.0.beta1
Updates the gem !
rails -v #Rails 5.0.0.beta1
rails 5.0 beta1 version installed successfully !
Find here more about rails5.0 !