update for docker doc (#11664)

Dockerfile

@@ -23,7 +23,7 @@ LABEL maintainer="Microsoft" \
       org.label-schema.usage="https://docs.microsoft.com/cli/azure/install-az-cli2#docker" \
       org.label-schema.build-date=$BUILD_DATE \
       org.label-schema.vcs-url="https://github.com/Azure/azure-cli.git" \
-      org.label-schema.docker.cmd="docker run -v \${HOME}/.azure:/root/.azure -it microsoft/azure-cli:$CLI_VERSION"
+      org.label-schema.docker.cmd="docker run -v \${HOME}/.azure:/root/.azure -it mcr.microsoft.com/azure-cli:$CLI_VERSION"
 
 # bash gcc make openssl-dev libffi-dev musl-dev - dependencies required for CLI
 # openssh - included for ssh-keygen

Dockerfile.nanoserver

@@ -15,7 +15,7 @@ LABEL maintainer="Microsoft" \
       org.label-schema.usage="https://docs.microsoft.com/cli/azure/install-az-cli2#docker" \
       org.label-schema.build-date=$BUILD_DATE \
       org.label-schema.vcs-url="https://github.com/Azure/azure-cli.git" \
-      org.label-schema.docker.cmd="docker run -v $HOME\.azure:C:\Users\ContainerUser\.azure -it microsoft/azure-cli:$CLI_VERSION"
+      org.label-schema.docker.cmd="docker run -v $HOME\.azure:C:\Users\ContainerUser\.azure -it mcr.microsoft.com/azure-cli:$CLI_VERSION"
 
 SHELL ["powershell", "-Command", "$ErrorActionPreference = 'Stop'; $ProgressPreference = 'SilentlyContinue';"]
 

README.md

@@ -103,7 +103,7 @@ To provide feedback from the command line, try the `az feedback` command.
 ### Docker
 
 We maintain a Docker image preconfigured with the Azure CLI.
-See our [Docker tags](https://hub.docker.com/r/microsoft/azure-cli/tags/) for available versions.
+See our [Docker tags](https://mcr.microsoft.com/v2/azure-cli/tags/list) for available versions.
 
 ```bash
 $ docker run -u $(id -u):$(id -g) -v ${HOME}:/home/az -e HOME=/home/az --rm -it mcr.microsoft.com/azure-cli:<version>