Add the sidekiq ui to the app

Gemfile

@@ -31,6 +31,7 @@ gem 'awesome_print'
 gem 'mail'
 gem 'sidekiq', '~> 3.5.0'
 gem 'sidekiq-failures', '~> 0.4.0'
+gem 'sinatra', require: false # for the Sidekiq UI
 
 group :development, :test do
   gem 'pry'

Gemfile.lock

@@ -117,6 +117,8 @@ GEM
       rack (>= 0.4)
     rack-mount (0.8.3)
       rack (>= 1.0.0)
+    rack-protection (1.5.3)
+      rack
     rack-test (0.6.3)
       rack (>= 1.0)
     rake (10.4.2)
@@ -149,12 +151,17 @@ GEM
       redis-namespace (~> 1.5, >= 1.5.2)
     sidekiq-failures (0.4.5)
       sidekiq (>= 2.16.0)
+    sinatra (1.4.6)
+      rack (~> 1.4)
+      rack-protection (~> 1.4)
+      tilt (>= 1.3, < 3)
     slop (3.6.0)
     spoon (0.0.4)
       ffi
     thor (0.19.1)
     thread_safe (0.3.5)
     thread_safe (0.3.5-java)
+    tilt (2.0.1)
     timecop (0.8.0)
     timers (4.1.1)
       hitimes
@@ -237,6 +244,7 @@ DEPENDENCIES
   rspec-sidekiq
   sidekiq (~> 3.5.0)
   sidekiq-failures (~> 0.4.0)
+  sinatra
   timecop
   torquebox (= 3.0.0)
   torquebox-messaging (= 3.0.0)

config.ru

@@ -1,5 +1,10 @@
 require File.expand_path('../config/environment',  __FILE__)
 
 require 'backbeat/web'
+require 'sidekiq/web'
 
-run Backbeat::Web::App
+class SidekiqUI < Grape::API
+  mount Sidekiq::Web => '/sidekiq'
+end
+
+run Rack::Cascade.new([Backbeat::Web::App, SidekiqUI])