Running Ruby on Rails with NGINX
Ruby on Rails is a full web application framework, based on the Ruby programming language. As with a more traditional framework such as Django, Rails is based around a standard Model View Controller (MVC) pattern. This makes it well suited to rapid development which is also highly performant and feature packed.

Getting ready
Although there are a number of different application servers for Rails, one of the more popular is Passenger. With the highest performance and great documentation, Passenger's popularity is well deserved. This recipe has been tested with Ruby 2.3, Rails 4.2, and Passenger 5.0.
We can install Passenger via gem
:
gem install passenger
To integrate with NGINX, this requires a special module to be enabled. We'll compile NGINX from scratch as per our installation in Chapter 1, Let's Get Started and compile Passenger support as a static module.
Note
Make sure you have the mainline repository from nginx.org installed.
For a Debian- / Ubuntu-based system...