hi it's a server.

main.go

@@ -0,0 +1,47 @@
+package main
+
+import (
+	"flag"
+	"fmt"
+	"net/http"
+	"os"
+	"strings"
+)
+
+var options struct {
+	port     int
+	hostname string
+}
+
+func bail(status int, template string, args ...interface{}) {
+	if !strings.HasSuffix(template, "\n") {
+		template += "\n"
+	}
+	if status == 0 {
+		fmt.Fprintf(os.Stdout, template, args...)
+	} else {
+		fmt.Fprintf(os.Stderr, template, args...)
+	}
+	os.Exit(status)
+}
+
+func main() {
+	flag.Parse()
+	cwd, err := os.Getwd()
+	if err != nil {
+		bail(1, "unable to get working directory: %v", err)
+	}
+	dir := http.Dir(cwd)
+	http.Handle("/", http.FileServer(dir))
+
+	addr := fmt.Sprintf("%s:%d", options.hostname, options.port)
+    fmt.Printf("serving %s on %s\n", cwd, addr)
+	if err := http.ListenAndServe(addr, nil); err != nil {
+		bail(1, "unable to start server: %v", err)
+	}
+}
+
+func init() {
+	flag.IntVar(&options.port, "port", 8000, "port to serve on")
+	flag.StringVar(&options.hostname, "host", "", "hostname")
+}