[ci skip] Add backend queue starting documentation

If you can't start your queue, you won't process much. This change adds external links to the Queue backends that have Active Job specific docs.

1 files changed, 12 insertions, 3 deletions

diff --git a/guides/source/active_job_basics.md b/guides/source/active_job_basics.md
index 17087d187a..a114686f0f 100644
--- a/guides/source/active_job_basics.md
+++ b/guides/source/active_job_basics.md
@@ -136,10 +136,19 @@ module YourApp
 end
 ```
 
-NOTE: Since jobs run in parallel to your Rails application, most queuing libraries
+### Starting the Backend
+
+Since jobs run in parallel to your Rails application, most queuing libraries
 require that you start a library-specific queuing service (in addition to
-starting your Rails app) for the job processing to work. For information on
-how to do that refer to the documentation of your respective library.
+starting your Rails app) for the job processing to work. Refer to library
+documentation for instructions on starting your queue backend.
+
+Here is a noncomprehensive list of documentation:
+
+- [Sidekiq](https://github.com/mperham/sidekiq/wiki/Active-Job)
+- [Resque](https://github.com/resque/resque/wiki/ActiveJob)
+- [Sucker Punch](https://github.com/brandonhilkert/sucker_punch#active-job)
+- [Queue Classic](https://github.com/QueueClassic/queue_classic#active-job)
 
 Queues
 ------