Move method to a more appropriate place

app/controllers/api/application_controller.rb

@@ -1,7 +1,2 @@
 class Api::ApplicationController < ::ApplicationController
-  def set_access_control_headers
-    if request.format.json?
-      response.headers['Access-Control-Allow-Origin'] = '*'
-    end
-  end
 end

app/controllers/concerns/public_api_exposing.rb

@@ -3,6 +3,12 @@ require 'active_support/concern'
 module PublicApiExposing
   extend ActiveSupport::Concern
 
+  def set_access_control_headers
+    if request.format.json?
+      response.headers['Access-Control-Allow-Origin'] = '*'
+    end
+  end
+  
   included do
     before_action :set_access_control_headers
   end