Official Docker Image based on Ubuntu

**Is your feature request related to a problem? Please describe.**
Current official Docker image is based on Alpine:

https://github.com/Azure/azure-cli/blob/dev/Dockerfile

I think at some point it would be good to have official image that can be used by **Visual Studio Code Remote - Containers**.
https://code.visualstudio.com/docs/remote/containers

Unfortunately:

"Note: Alpine Linux and Windows based dev containers are not currently supported."

**Describe the solution you'd like**
Perhaps it would make sense to have Ubuntu based container as well?

**Describe alternatives you've considered**
I was testing this scenario with Dockerfile included in .devcontainer, however this solution is pretty inefficient. Having official developers container would be really useful.
Perhaps Dockerfile should be in azure-cli-dev-tools though.

**Additional context**