Serving Yard Documentation with Rails and HighVoltage

yard.rb

# config/routes.rb
get "/doc"     => "docs#show", id: "index"
get '/doc/*id' => 'docs#show'

# app/controllers/docs_controller.rb
class DocsController < HighVoltage::PagesController
  respond_to :html
  layout false

  def show
    render file: current_page
  end
end

# config/initializers/high_voltage.rb
HighVoltage.routes = false
HighVoltage.layout = false
HighVoltage.content_path = Rails.root.join 'doc/'