publish doesn't support general container images

[weikanglim]

Scenario: I have sidecar and init car containers that are built from source (Dockerfile) in my current repository. I like the simplified publish command for publishing images to ACR.

I tried to add a predeploy hook to publish these images to ACR:

    hooks:
      predeploy:
        run: |
          docker build ../init-app -t init-app:latest
          azd publish --from-package init-app:latest

This ended up creating a side effect of overriding SERVICE_WEB_IMAGE_NAME and I couldn't get it working as expected. I was blocked.

Should azd publish support more scenarios broadly than just publishing the "one image" defined as a service?