Function mount

packages/app/src/app.ts:19–19

(fn: App | Handler)

const lead = (x: string) => (x.charCodeAt(0) === 47 ? x : '/' + x)

const mount = (fn: App | Handler) => (fn instanceof App ? fn.attach : fn)

export const applyHandler = <Req, Res>(h: Handler<Req, Res>) => async (req: Req, res: Res, next?: NextFunction) => {
  try {