We like the default RuboCop rules and we try to follow them, with some exceptions.
RuboCop itself is a gem so should only need to gem install rubocop.
To use the our custom configuration you can simply copy and paste the rubocop.yml inside the root of your project.
RuboCop can be integrated within many editors by using various plugins. Here's some references:
The rubocop.yml has two points that need to be customized
based on the Ruby version in use.
You can find them by searching **to customzie**.