Route = object
  httpMethod*: HttpMethod
  path*: string
  controller*: proc (req: Request): Future[string] {....gcsafe.}

proc runServe(routes: seq[Route]; port = 8080): owned(Future[void]) {.
    ...raises: [Exception],
    tags: [RootEffect, WriteIOEffect, ReadIOEffect, ReadDirEffect, TimeEffect].}