update sidekiq initializer to use the pausable middleware

config/initializers/sidekiq.rb

@@ -1,7 +1,17 @@
+require "sidekiq/pausable"
+
 sidekiq_redis = { url: $redis.url, namespace: 'sidekiq' }
 
+Sidekiq.configure_client do |config|
+  config.redis = sidekiq_redis
+end
+
 Sidekiq.configure_server do |config|
   config.redis = sidekiq_redis
+  # add our pausable middleware
+  config.server_middleware do |chain|
+    chain.add Sidekiq::Pausable
+  end
 end
 
 if Sidekiq.server?
@@ -32,6 +42,4 @@ if Sidekiq.server?
   end
 end
 
-Sidekiq.configure_client { |config| config.redis = sidekiq_redis }
 Sidekiq.logger.level = Logger::WARN
-