It could be doable possibly with a microframework that's optimized to cache views into a public directory the .htaccess checks first, before passing requests to the framework. Toss in a simple web-based CMS and a frontend for Composer (mumble mumble profit.)

I'm ashamed to admit i've been working on something along these lines off and on for a while but have nothing brilliant to show for my efforts. But the basic idea is entirely possible.