Ingress with the wildcard ssl certificate of Lets Encrypt on AKS

First thing on Azure

1. Please refer to Quickstart for Bash in Azure Cloud Shell and enter the azure bash.

2. Show you account information by typing "az account show" and note your subscription id and tenant id be showed as the following picture.

4. Use "az aks get-credentials --resource-group <your-resource-group-of-your-aks> --name <your-aks-name>" to get the access right of kubectl