package mainimport (	"io"	"log"	"net/http")//hello world, the web serverfunc HelloServer(w http.ResponseWriter, req *http.Request) {	io.WriteString(w, "hello, world!\n")}func main() {	http.HandleFunc("/hello", HelloServer)	err := http.ListenAndServe(":8800", nil)	if err != nil {		log.Fatal("ListenAndServe: ", err)	}}