Use any SSG not written in javascript and you'll be fine. Hugo, Zola, Jekyll, etc. Though if I was starting from scratch I might avoid Jekyll just because of the Ruby dependency.
> Use any SSG not written in javascript and you'll be fine.
Commonly stated but not actually true. For example:
https://github.com/getzola/zola/blob/master/Cargo.lock
https://github.com/gohugoio/hugo (scroll to the bottom of the README)