Found config-map as parameter but the documentation is kind of sparse.

with:
  command: up
  config-map: "imageTag: ${{ github.sha }}"

This will pass an empty config value

config-map: "{imageTag: ${{ github.sha }}}"

Or is it like this?

Thanks for sharing

I even had a look in the examples directory of the actions repository, and learned a thing or two. But this one, I failed pretty hard on 🙂