You probably know that Dan Nicholson published a simplified branch of Endless deb-ostree-builder:
https://github.com/dbnicholson/deb-ostree-builder/tree/simple-builder I played a bit with that lately, so I can also provide some additional documentation, a real step-by-step to use these scripts. Note that these scripts require access to the apt repository https://deb-ostree-test.endlessm.com/debian, that provides the ostree-boot package. If we wait for #824650 [1] to be solved, then we don't need a third-party repo, and we can simplify the procedure. So probably better to wait for that. BTW, how do you plan to publish the documentation? In a README in the packaging files, or Debian wiki? Cheers [1]: ostree: reinstate boot integration as new ostree-boot package https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=824650