message: Adds item to docs summary
diff: * [Setting up Xdebug with Lagoon](using-lagoon-advanced/setting-up-xdebug-with-lagoon.md)
  * [Environment Idling](using-lagoon-advanced/environment-idling.md)
  * [Installing Lagoon Into Existing Kubernetes Cluster](using-lagoon-advanced/installing-lagoon-into-existing-kubernetes-cluster.md)
  +* [Custom Tasks](using-lagoon-advanced/custom-tasks.md)
  ## Drupal
  