Requirements and process listed in build.sh
Live build scaffolding before git drops empty dirs:
$ ls config/
apt build hooks includes.chroot packages rootfs
archives chroot includes includes.installer packages.binary source
binary common includes.binary includes.source packages.chroot
bootstrap debian-installer includes.bootstrap package-lists preseed
includes* -> flat file drop in (includes.chroot/usr/bin/script would install script in /usr/bin/)
archives -> debian repo stuff
hooks -> scripts (you'll only need to add to the normal ones)
package-lists -> list of packages
packages* -> paste in debs