add note about bash join_by function
add example upgrading script
add .build.yml
fix duplicate package upgrade lines it is common practice to have multiple kernel-* packages installed to have a fallback version. while upgrading, we only need to 'upgrade' _one_ of the installed packages of the same name. nb: it may be worth a thought to rewrite the whole package upgrading, but it is fast enough for now, so that the double loop isn't too painful for now.
go modulize
add debug flag
remove check for uid/gid in FILELIST.TXT
initial commit