Disable middleware if Propshaft is installed

Author: LukasSkywalker

lib/heavens_door/engine.rb

@@ -5,9 +5,11 @@
 module HeavensDoor
   class Engine < ::Rails::Engine #:nodoc:
     initializer 'HeavensDoor' do |app|
-      app.middleware.use HeavensDoor::Middleware
+      if !defined?(Propshaft)
+        app.middleware.use HeavensDoor::Middleware
 
-      app.config.assets.precompile += %w(heavens_door.js heavens_door.css)
+        app.config.assets.precompile += %w(heavens_door.js heavens_door.css)
+      end
     end
   end
 end