I've recently been working on SparkShell: https://sparkshell.dev
It's an online development platform similar to other things like Replit, but it's mainly for static site hosting. You can create projects and make custom subdomains for them. You can add libraries to your project in a click of a button, so you don't have to add scripts or CSS files to every single file of yours. I've recently been doing a lot of work on it and I hope to launch it pretty soon.