Add a link to the "Uninstall Docker Engine" section

content/en/docs/tasks/administer-cluster/migrating-from-dockershim/change-runtime-containerd.md

@@ -163,3 +163,10 @@ sudo apt-get purge docker-ce docker-ce-cli
 {{% /tab %}}
 {{< /tabs >}}
 
+The above commands don't remove images, containers, volumes, or customized configuration files on your host.
+To delete them, see the [Uninstall Docker Engine](https://docs.docker.com/engine/install/ubuntu/#uninstall-docker-engine) section
+within the documentation for Docker.
+
+{{< caution >}}
+It has a risk of deleting containerd, be careful when executing commands on that docs page.
+{{< /caution >}}