This README would document the important steps made throughout the course.
This on is simple. Add these ones to your Gemfile:
gem 'rspec-rails', '3.1.0'
gem 'capybara', '2.7.1'
These gems aren't necessary for production, so they can be in test and development groups in the Gemfile. The course didn't explained, why we have to use these specific versions.
Then install RSpec for the application with
rails g rspec:install
and create a stub for RSpec running
bundle binstubs rspec-core