This is was silverblue setup using OSTree Native Container.
This builds the ./Dockerfile with podman.
They used to be pushed to:
ghcr.io/jmarrero/jmarrero-silverblue:latest
There are examples, replacing packages, installing kernel modules and much more at: https://github.com/coreos/layering-examples CoreOS layering examples should work with Silverblue by changing the base image.