add sidekiq web ui and redirect from root to admin

Author: damianlegawiec

config/routes.rb

@@ -1,3 +1,5 @@
+require 'sidekiq/web'
+
 Rails.application.routes.draw do
   Spree::Core::Engine.add_routes do
     # Admin authentication
@@ -25,7 +27,14 @@
   devise_for :admin_users, class_name: "Spree::AdminUser"
   devise_for :users, class_name: "Spree::User"
 
+  # Sidekiq Web UI
+  authenticate Spree.admin_user_class.model_name.singular_route_key.to_sym, ->(admin_user) { admin_user.spree_admin? } do
+    mount Sidekiq::Web => "/sidekiq" # access it at http://localhost:3000/sidekiq
+  end
+
   # Reveal health status on /up that returns 200 if the app boots with no exceptions, otherwise 500.
   # Can be used by load balancers and uptime monitors to verify that the app is live.
   get "up" => "rails/health#show", as: :rails_health_check
+
+  root to: redirect('/admin')
 end