Use shared include file for prerequisites.

docs/tutorials/stateless-application/expose-external-ip-address.md

@@ -11,15 +11,7 @@ external IP address.
 
 {% capture prerequisites %}
 
-* Install [kubectl](http://kubernetes.io/docs/user-guide/prereqs).
-
-* Use a cloud provider like Google Container Engine or Amazon Web Services to
-  create a Kubernetes cluster. This tutorial creates an
-  [external load balancer](/docs/user-guide/load-balancer/),
-  which requires a cloud provider.
-
-* Configure `kubectl` to communicate with your Kubernetes API server. For
-  instructions, see the documentation for your cloud provider.
+{% include task-tutorial-prereqs.md %}
 
 {% endcapture %}