I gone through a lot of hosting service providers and unfortunetly cannot find a single one that can be used without running nonfree programs, all of them require loading bulky JavaScript apps.
I know of Codeberg Pages for example, but it is not suitable for business use.
Heck, if you want to really want to be a luddite you could use the raw API! :) Most hosting platforms/registrars can be commanded with just curl.