Update Rack::Cors configuration in production environment

Author: tuanle03

config/environments/production.rb

@@ -91,10 +91,12 @@
   # Do not dump schema after migrations.
   config.active_record.dump_schema_after_migration = false
 
-  config.middleware.insert_before(0, Rack::Cors) do
+  config.middleware.insert_before 0, Rack::Cors do
     allow do
-      origins 'https://codelearn-api-72b30d70ca73.herokuapp.com/'
-      resource '*', headers: :any, methods: %i[get post patch put delete options]
+      origins '*'
+      resource '*',
+        headers: :any,
+        methods: %i[get post patch put delete options head]
     end
   end
 end