Implement close window on server level

app/controllers/dashboard_controller.rb

@@ -12,6 +12,10 @@ class DashboardController < ApplicationController
     log.save
   end
 
+  def close_window
+    render layout: false
+  end
+
   # Testing action
   def select_qrcode
     #@tables = Table.all.sample(2) | List.active.map(&:table)