add content_type param, kubeadm pages

add no_list, clean up toc-hide params

content/en/docs/reference/setup-tools/kubeadm/kubeadm-join-phase.md

@@ -1,7 +1,9 @@
 ---
 title: kubeadm join phase
 weight: 90
+content_type: concept
 ---
+
 `kubeadm join phase` enables you to invoke atomic steps of the join process.
 Hence, you can let kubeadm do some of the work and you can fill in the gaps
 if you wish to apply customization.
@@ -56,7 +58,8 @@ Using this phase you can join a node as a control-plane instance.
 {{< tab name="mark-control-plane" include="generated/kubeadm_join_phase_control-plane-join_mark-control-plane.md" />}}
 {{< /tabs >}}
 
-## What's next
+## {{% heading "whatsnext" %}}
+
 * [kubeadm init](/docs/reference/setup-tools/kubeadm/kubeadm-init/) to bootstrap a Kubernetes control-plane node
 * [kubeadm join](/docs/reference/setup-tools/kubeadm/kubeadm-join/) to connect a node to the cluster
 * [kubeadm reset](/docs/reference/setup-tools/kubeadm/kubeadm-reset/) to revert any changes made to this host by `kubeadm init` or `kubeadm join`