Rails hello world application

Gemfile

source 'http://rubygems.org'

gem 'rails', '3.1.0'

gem 'sqlite3'
gem 'json'

group :assets do
  gem 'sass-rails', "  ~> 3.1.0"
  gem 'coffee-rails', "~> 3.1.0"
  gem 'uglifier'
end

gem 'jquery-rails'
gem 'therubyracer'
gem 'mongrel'

routes.rb

Helloworldrails::Application.routes.draw do
  root :to => 'welcome#index'
end

welcome_controller.rb

class WelcomeController < ApplicationController
  def index
    render :text => "<h1>Hello World</h1>"
  end
end