This is very cool. I love Lua, though my experience with it is limited to the few weeks I spent playing around with it as a Source engine scripting language in Half-Life 2: Sandbox. Still, it was very fun to learn, and I think this is an interesting application outside of its usual game scripting territory that I'd love to try out sometime. Great work! Thanks for sharing.
Sailor's website does not use the bootstrap feature. To be honest I just picked a random nice-looking open template. It has its issues but it's not that bad! XD I confess I gotta work on that. Thanks for pointing it out!
There seems to be a trend. It's really nice, because just about everything has a Lua interface these days and you can make nice applications in it. Like Lua works embedded in databases like Redis or web servers like nginx or operating system kernels, like NetBSD. And it's really simple to learn and really performant, especially with LuaJIT.
I always feel like it is showing off with simplicity, while still being a "normal" language the majority of people easily can get into quickly. I always like the give the example of my brother finishing games with love2d (basically just wrapping SDL, especially back then) in a matter of days, without prior programming knowledge (unless you call basic HTML and CSS programming, no JS).
We do have OpenResty support. But sailor doesn't work just with it. It also works on Apache, Xavante (a lua written server) and Mongoose (a very lightweight server)