README: add another blog post

We were using k3sup for a university project and wrote a blog post
about it :)

README.md

@@ -340,6 +340,8 @@ MIT
 
 * [Raspberry Pi: From 0 to k3s cluster in 5 min with k3sup and Ansible](https://blog.cloudgsx.es/topic/10/raspberry-pi-from-0-to-k3s-cluster-in-5-min-with-k3sup-and-ansible) - by Pablo Caderno
 
+* [Kubernetes: from Zero to Hero with Kompose, Minikube, k3sup and Helm](https://blog.mi.hdm-stuttgart.de/index.php/2020/02/29/image-editor-on-kubernetes-with-kompose-minikube-k3s-k3sup-and-helm-part-2/) by Leon Klingele, Alexander Merker & Florian Wintel
+
 Checkout the [Announcement tweet](https://twitter.com/alexellisuk/status/1162272786250735618?s=20)
 
 ## Similar tools & glossary