Add Tutorial Setup-ha-etcd-Cluster

[pomland-94]

I have read and understood the Contributor's Certificate of Origin available at the end of https://raw.githubusercontent.com/hetzneronline/community-content/master/tutorial-template.md and I hereby certify that I meet the contribution criteria described in it. Signed-off-by: Patrick Omland [email protected]

[pomland-94]

Das Tutorial wird im laufe der Zeit noch ins Englische übersetzt, da ich kein fließendes Englisch spreche brauche ich dazu etwas. Ich wünsche trotzdem viel Spaß damit. :)

[raspla]

@leojakeson

If you're not fluent in English, but you have a great tutorial to share in a different language, please reach out to us. We are open to the possibility of making exceptions for specific tutorials.

Exception granted here?

[raspla]

@leojakeson please take a look

[svenja11]

This tutorial is very similar to this one: Set up a High Availability etcd Cluster with kubeadm