I’m trying to build a Debian package on a ubuntu container job on azure pipeline.

Here is my setup:

pool: 'AWSLinux'

container: 
  image: ubuntu:20.04

But it looks ubuntu:20.04 docker image does not have some required tools installed.(SUDO,SVN,dpkg-architecture)

But I don’t have these missing tools problems when building on Ubuntu vmImage like below:

pool:
  vmImage: ubuntu-20.04  

So my plan is to pull a Ubuntu Docker image somewhere that equivalent to vmImage: ubuntu,
and push to my private Harbor registry to reference it in a container spec:

container:
  image: registry:ubuntu2004
  endpoint: private_harbor_connection

The question is where to find this Ubuntu Docker image that equivalent to vmImage: ubuntu?
Is there any better solution for my problem? Thanks.