Update README.md

Author: pascalgn

README.md

@@ -2,7 +2,6 @@
 
 [![Build Status Appveyor](https://img.shields.io/appveyor/ci/pascalgn/azi.svg?style=flat-square&label=appveyor)](https://ci.appveyor.com/project/pascalgn/azi)
 [![Build Status CircleCI](https://img.shields.io/circleci/project/azrtools/azi.svg?style=flat-square&label=circleci)](https://circleci.com/gh/azrtools/azi)
-[![Build Status Docker](https://img.shields.io/docker/cloud/automated/azrtools/azi.svg?style=flat-square)](https://hub.docker.com/r/azrtools/azi/)
 [![License](https://img.shields.io/github/license/azrtools/azi.svg?style=flat-square)](LICENSE)
 
 Show Azure information.
@@ -49,8 +48,8 @@ If you want to keep the authentication tokens between runs, use
 
 ```sh
 docker volume create azi
-docker run --rm --mount source=azi-tmp,target=/home/azi azrtools/azi list
-docker run --rm --mount source=azi-tmp,target=/home/azi azrtools/azi dns
+docker run --rm -v azi:/home/azi azrtools/azi list
+docker run --rm -v azi:/home/azi azrtools/azi dns
 docker volume rm azi
 ```