I'm very new to Koajs (http://koajs.com/) but i've used Express quite a bit. As the team behind Express made Koa I wanted to try it.
When i'm starting a new express project all I need to type is
express projectname
express
Koa doesn't have what you're asking for. I'd suggest looking at the koa wiki page, there are several boilerplates listed there that you could clone.