adding proxy settings
Spree::Core::Engine.add_routes do
    namespace :admin do
      get 'static_contents/edit'

      resources :reports, only: [:index] do
        collection do
          get :sources_statistics
          post :sources_statistics
        end
      end
    end
  end
inserting destinations menu on admin config
adding some scaffold as starting point
renaming AdminDestinationsController to DestinationsController
extending static_contents_controller.rb and destinations_controller.rb from Spree::Admin::ResourceController instead from Spree::Admin::BaseController
listing destinations pretty well
TODO:
implement links to new, edit, delete
refactoring destinations_controller.rb, every work pretty well except edit destinations
edit destinations works very well
creating static_content.rb model and run migrations
Merge branch 'feature/admin_config_destinations' into develop
removing proxy settings
Merge branch 'release/1.25' into develop