Config.ru

In config.ru file loads up the gem bundler and runs the rack application.

# Load Ruby Gems
require 'bundler'
Bundler.require
Loader.autoload

# Load App
require './app.rb'
run AppName

Load Ruby Gems

Ensures you’re loading Gemfile defined gems.

Load App

Require the app.rb file and then run the application to web server with run AppName.

Note: it is recommended that you change the AppName for your projects. Make sure to change them in both config.ru and app.rb files.