doc updates (kubernetes-sigs#1596)

* add security updates disclaimer
* add makefile target to publish versioned docs using mkdocs mike util

Author: kishorj

Makefile

@@ -79,6 +79,10 @@ else
 CONTROLLER_GEN=$(shell which controller-gen)
 endif
 
+# publish the versioned docs using mkdocs mike util
+docs-publish:
+	mike deploy v2.0 latest -p
+
 lint:
 	echo "TODO"
 

docs/guide/controller/installation.md

@@ -4,6 +4,9 @@
     AWS ALB Ingress controller must be uninstalled before installing AWS Load Balancer controller.
     Please follow our [migration guide](../upgrade/migrate_v1_v2.md) to do migration.
 
+!!!note "Security updates"
+    The controller doesn't receive security updates automatically. You need to manually updgrade to a newer version when it becomes available.
+
 === "Via Helm"
     Follow the instructions in [aws-load-balancer-controller](https://github.com/aws/eks-charts/tree/master/stable/aws-load-balancer-controller) helm chart.