Ubuntu-latest docker image?

How do I figure out what docker image ubuntu-latest is?

What is the mapping?

Do you mean ubuntu-latest as in runs-on: ubuntu-latest? In that case that’s no Docker image, it’s a VM.

The actions/virtual-environments repository has details on the runner VM environments:

So it’s not a standard Docker image I can try locally? That sucks a bit.

I just wanted to know what default TTF files on the image I could rely upon.