That's definitely server side JS, but I thought the person I was replying to meant a web server that was written in JS, but I suppose "powered" could mean that

That's definitely server side JS, but I thought the person I was replying to meant a web server that was written in JS, but I suppose "powered" could mean that it just runs JS. I saw that link elsewhere in this thread after my reply, and I also thought that this might have been what was being referred to.