For Ubuntu I use the Core/Base images as available here: http://cdimage.ubuntu.com/ubuntu-base/releases/
Does Debian ship similar type of release images? I can't seem to find these on https://www.debian.org/distrib/. Debian does publish Docker-specific images on the Docker hub, but not the "upstream" rootfs, apparently. Or am I missing something? :)
Also accepted as an answer; how to create such a core/base image?/
debootstrap something something I guess?