All my docker images in one mono-repository with multi-arch support. If you have any questions feel free to contact me. You can find all the options to contact me on my website supersandro.de.
If you wish to view the difference between two releases of a docker image you can use container-diff.
Just download it according to their Readme and run container-diff diff supersandro2000/kibitzr:5.4.0 supersandro2000/kibitzr:latest --type=apt --type=pip --type=size 2> /dev/null replacing the supersandro2000/kibitzr:5.4.0 with the images and versions you want to compare.
The old lib directory is succeeded by buildx. It mostly replicated buildx functionality in Make and bash. The removal commit is 6c274c2142f4775e00b412b9d995df421b26eb07
Thanks to tianon for doing such an awesome job with the offical library and providing very good examples with them. Thanks to napnap75 for inspiring me to do this with his rpi-docker-images repo.