HTTP server cơ bản trong Go viết thế nào?

package main

import (
    "fmt"
    "net/http"
)

func helloHandler(w http.ResponseWriter, r *http.Request) {
    fmt.Fprintf(w, "Hello, %s!", r.URL.Path[1:])
}

func main() {
    mux := http.NewServeMux()
    mux.HandleFunc("/hello", helloHandler)
    mux.HandleFunc("/health", func(w http.ResponseWriter, r *http.Request) {
        w.WriteHeader(http.StatusOK)
        fmt.Fprint(w, "ok")
    })

    srv := &http.Server{
        Addr:         ":8080",
        Handler:      mux,
        ReadTimeout:  5 * time.Second,
        WriteTimeout: 10 * time.Second,
    }
    log.Fatal(srv.ListenAndServe())
}