Convert site to Hugo (#8316)

This commit converts content and layout to use Hugo.

content/en/docs/reference/setup-tools/kubeadm/kubeadm-reset.md

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+---
+approvers:
+- mikedanese
+- luxas
+- jbeda
+title: kubeadm reset 
+content_template: templates/concept
+---
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+
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+{{< include "generated/kubeadm_reset.md" >}}
+
+### External etcd clean up!
+
+`kubeadm reset` will not delete any etcd data if external etcd is used. This means that if you run `kubeadm init` again using the same etcd endpoints, you will see state from previous clusters. 
+
+To wipe etcd data it is recommended you use a client like etcdctl, such as:
+
+```bash
+etcdctl del "" --prefix
+```
+
+See the [etcd documentation](https://github.com/coreos/etcd/tree/master/etcdctl) for more information.
+{{% /capture %}}
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+{{% capture whatsnext %}}
+* [kubeadm init](kubeadm-init.md) to bootstrap a Kubernetes master node
+* [kubeadm join](kubeadm-join.md) to bootstrap a Kubernetes worker node and join it to the cluster
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+