edit cors

config/initializers/cors.rb

@@ -1,4 +1,5 @@
-config.middleware.insert_before 0, Rack::Cors do
+# frozen_string_literal: true
+Rails.application.config.middleware.insert_before 0, Rack::Cors do
   allow do
     origins '*'
     resource '*', :headers => :any, :methods => [:get, :post, :options]