code: func (app *Application) ServeHTTP(res http.ResponseWriter, req *http.Request) {
  	ctx := app.pool.Get().(*Context)
  	ctx.reset()
  	ctx.Request = req
  	ctx.Response = res
  	ctx.App = app
  	app.handlerChain(ctx)
  	app.pool.Put(ctx)
  }
docs: // Basic entrance of an `http.ResponseWriter` and an `http.Request`.