Fix few issues

lib/tailwindcss/engine.rb

@@ -2,8 +2,13 @@
 
 module Tailwindcss
   class Engine < ::Rails::Engine
-    initializer 'tailwindcss.add_engines_roots_config' do
-      Rails.application.config.tailwindcss_rails.engines = []
+    config.before_configuration do |app|
+      app.config.tailwindcss_rails = ActiveSupport::OrderedOptions.new
+      app.config.tailwindcss_rails.engines = []
+    end
+
+    initializer 'tailwindcss.load_hook' do |app|
+      ActiveSupport.run_load_hooks(:tailwindcss_rails, app)
     end
 
     initializer "tailwindcss.disable_generator_stylesheets" do

lib/tasks/build.rake

@@ -9,7 +9,7 @@ namespace :tailwindcss do
     puts "Running: #{Shellwords.join(command)}" if verbose
 
     system(env, *command, exception: true)
-    remove_tempfile!
+    Tailwindcss::Commands.remove_tempfile!
   end
 
   desc "Watch and build your Tailwind CSS on file changes"
@@ -27,7 +27,7 @@ namespace :tailwindcss do
   rescue Interrupt
     puts "Received interrupt, exiting tailwindcss:watch" if args.extras.include?("verbose")
   ensure
-    remove_tempfile!
+    Tailwindcss::Commands.remove_tempfile!
   end
 end