added ingress addon to minikube example

kubernetes/Readme.md

@@ -15,6 +15,8 @@
 * Install Minkube
   * https://github.com/kubernetes/minikube
 * minikube start --memory=4096 --cpus=2
+* minikube addons enable ingress
+* echo "$(minikube ip) zammad.example.com" | sudo tee -a /etc/hosts
 * minikube ssh
   * su -
   * sysctl -w vm.max_map_count=262144
@@ -22,3 +24,5 @@
 * minikube dashboard
   * switch to namespace "zammad"
   * open "Overview" and wait until all pods are green
+* access zammad on:
+  * http://zammad.example.com