add skeleton

lib/periodicity/rails.rb

@@ -0,0 +1,13 @@
+module Periodicity
+  def self.hook_rails!
+    ActiveSupport.on_load(:active_job) do
+      extend Sidekiq::Extensions::ActiveJob
+    end
+  end
+
+  class Rails < ::Rails::Engine
+    initializer 'periodicity' do
+      Periodicity.hook_rails!
+    end
+  end if defined?(::Rails)
+end