[general question] How to authenticate and run purge command using docker container

Hello,
I'm trying to use acr-cli docker container to run unattended purge command against azure container registry behind the private endpoint (since it doesn't support acr tasks)

So I have docker build and can run it but wonder how can I execute the following commands in an unattended 👍

az acr login --name
acr purge --filter 'image:.*' --ago 30d --untagged --dry-run