You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: test.rb
    path of file: ./repos/gitlabhq/spec/contracts/provider/environments
    
    the code of the file until where you have to start completion: # frozen_string_literal: true

module Provider
  module Environments

    
      def self.app
        Rack::Builder.app do
          map "/" do
            run Gitlab::Application
          end
        end
      end