Signed-off-by: Adrian Hinz <ahinz@voicetelecom.pl>

config/application.rb

@@ -13,7 +13,14 @@ module InvoiceKeeper
     # -- all .rb files in that directory are automatically loaded.
     config.i18n.load_path += Dir[Rails.root.join('config', 'locales', '**', '*.{rb,yml}').to_s]
     config.i18n.default_locale = :pl
-    config.action_dispatch.default_headers['X-Frame-Options'] = "ALLOW-FROM http://lvh.me"
+    config.middleware.insert_before 0, Rack::Cors do
+      allow do
+        origins '*'
+        resource '*', :headers => :any, :methods => [:get, :post, :options]
+      end
+    end
+
+
     config.assets.paths << Rails.root.join('app', 'assets', 'fonts')
     config.assets.precompile += %w( .svg .eot .woff .ttf .otf .woff2 )
   end