rails in solidus_frontend-2.6.0.rc1

- old
+ new

@@ -1,8 +1,10 @@
 #!/usr/bin/env ruby
+# frozen_string_literal: true
+
 # This command will automatically be run when you run "rails" with Rails 3 gems installed from the root of your application.
 
-ENGINE_ROOT = File.expand_path('../..', __FILE__)
-ENGINE_PATH = File.expand_path('../../lib/spree/frontend/engine', __FILE__)
+ENGINE_ROOT = File.expand_path('..', __dir__)
+ENGINE_PATH = File.expand_path('../lib/spree/frontend/engine', __dir__)
 
 require 'rails/all'
 require 'rails/engine/commands'