This is the Git repo of the Docker official image for debian. See the Docker Hub page for the full readme on how to use this Docker image and for information regarding contributing and issues.
The full readme is generated over in docker-library/docs, specificially in docker-library/docs/debian.
This image is maintained by tianon and paultag, who are Debian Developers.
This image is built using contrib/mkimage.sh from github.com/docker/docker, where the interesting bits live in contrib/mkimage/debootstrap. The mkimage.sh file here is a symlink to my local copy of that mkimage.sh script (which enables it to find the debootstrap script it needs).
The master branch contains the scripts and is where any "development" happens, and the dist branch contains the built tarballs and the build logs.