I've repurposed my old and broken Glo HD by installing MediaWiki on it, so now InkBox/KoBox have their own wiki! The Glo HD is natively running Alpine 3.13.4, and although it is somewhat slow, it's usable.
EDIT from the future: the Wiki has moved to an Alpine LXC container, because the Kobo's MMC was becoming quite erratic in read/writes, so I backed up all I could before a disaster would happen and transferred it there.
It's live there:
https://inkbox.ddns.net/wiki
Please be patient for the loading times, I'll look into enabling OPCache but it will probably still suffer from the hardware it is running from.
Also, please don't brute-force it or anything, I don't know if this thing can catch fire but I hope not