You don't need a separate image. You can run a script to install a rootless systemd service that starts the Docker daemon. You just point the Docker client to t

You don't need a separate image. You can run a script to install a rootless systemd service that starts the Docker daemon. You just point the Docker client to that rootless daemon's socket and do things as before. You'll need some configuration if you want to expose system ports (below 1024).