Golang static file server

<!-- lang: cpp -->

 package main

    import (
        "fmt"
        "net/http"
        "os"
    )

    func main(){

        fileServer := http.FileServer(http.Dir("./"))
        err := http.ListenAndServe(":3000", fileServer)

        if err != nil {
            fmt.Println("some error", err.Error())
            os.Exit(1)
        }
    }