there is no sub-url for this router, how snap know when to use `serveStaticPages`?I'm thinking there a document about this but cant find it.
We don't have anything for this right now, but it shouldn't be too
hard to do and we're very willing to accept code.
> line `addRoutes [ ("", serveStaticPages) ]` at snap-static-web
>
> there is no sub-url for this router, how snap know when to
> use `serveStaticPages`?
This just means that no routing prefix is required. serveStaticPages
will do some route matching on its own and if nothing matches, it will
fail and the next handler attached to "" will be called.