HN user
MAME has no printer emulation, which I like to use for a more holistic retro computing experience.
That's wrong. I haven't tried it with the Kaypro emulation, but here's a video showing the mc68000 computer printing to an emulated Epson ActionPrinter 2000: https://streamable.com/rvenyx
It's also possible to print to a text file.
Also, slightly meta: What is this web ... app(?)? Looks like a git frontend?
Seems to be a custom git frontend written by him: https://franke.ms/git/bebbo/tigler
Hetzner supports object storage now: https://www.hetzner.com/storage/object-storage/
Or you might consider Scaleway, who also do managed relational databases.
Here's how smooth scrolling looked on a real terminal: https://i.imgur.com/S44JaCh.mp4
This is the Falco 5220e terminal emulated by MAME. It's running the vttest tool.