Yeah, I was going to recommend Keybase as well, despite still being extremely butt-hurt over the sale to Zoom and subsequent abandonment of continued development on it. While it has some limitations, it's hard to beat their combination of uptime, price, a built-in Markdown parser so you don't even have to muck around with Jekyll/Hugo/Pelican et al., as well as mobile apps that expose the files and directory structure for editing on the go. You can even map it to your own external domain.