golang closer with manners webserver

main.go

package main

import (
	"io"
	"log"
	"net/http"
	"time"

	"github.com/braintree/manners"
	"github.com/xlab/closer"
)

func main() {
	// start the http server
	http.HandleFunc("/", hello)
	server := manners.NewWithServer(&http.Server{Addr: ":8080", Handler: nil})

	// a channel to check on exit that ListenAndServe is done
	exitChan := make(chan struct{})
	closer.Bind(func() {
		<-exitChan
	})
	// bind server.Close to be called if app is exiting because of a signal
	closer.Bind(func() {
		server.Close()
	})
	if err := server.ListenAndServe(); err != nil {
		log.Fatalln(err)
	}
	close(exitChan)
}

func hello(w http.ResponseWriter, r *http.Request) {
	// pretend to do some work
	time.Sleep(3000 * time.Millisecond)
	io.WriteString(w, "Hello world!")
}