A good example of a gemfile

gistfile1.txt

source 'https://rubygems.org'

gem 'rails', '4.2.0'
gem 'sass-rails'
gem 'uglifier', '2.5.3'
gem 'coffee-rails', '4.1.0'
gem 'jquery-rails', '4.0.3'
gem 'turbolinks', '2.3.0'
gem 'jbuilder', '2.2.3'
gem 'sdoc', '0.4.0', group: :doc

group :development, :test do
	gem 'sqlite3', '1.3.9'
	gem 'byebug', '3.4.0'
	gem 'web-console', '2.0.0.beta3'
	gem 'spring', '1.1.3'
end 

group :test do
	gem 'minitest-reporters', '1.0.5'
	gem 'mini_backtrace', '0.1.3'
	gem 'guard-minitest', '2.3.1'
end

group :production do
	gem 'pg', '0.17.1'
	gem 'rails_12factor', '0.0.2'
end