디바이스 메인 템플릿 스타일 적용

app/controllers/application_controller.rb

@@ -1,4 +1,12 @@
 class ApplicationController < ActionController::Base
   # Only allow modern browsers supporting webp images, web push, badges, import maps, CSS nesting, and CSS :has.
   allow_browser versions: :modern
+
+  before_action :set_controllers
+
+  private
+
+  def set_controllers
+    @controllers = Controller.all
+  end
 end