I will! cleaning up now and going to publish it later on github. The main idea was a least privilege approach to running simple desktop applications independent from the host OS and being able to control filesystem/network access on a per app basis. (spotify on fedora without flatpak or rpm-fusion repo's, not even sudo needed to install)
No real need for full Flatpak, Bubblewrap (bwrap) is intended to be a lightweight sandbox providing this out of the box, with Flatpak (and other stuff besides) building upon it. The Arch wiki has a nice introductory page: https://wiki.archlinux.org/title/Bubblewrap
Oh didn't know about bwrap yet! If i understand the wiki page correctly, you still need to get those binaries to your pc. So thats why i went with plain and simple dockerfiles.
