My go to http helloworld app.

helloworld.go

package main

// Statically compile with; 
// go build -a -tags netgo -installsuffix netgo helloworld.go

import (
	"fmt"
	"html"
	"log"
	"net/http"
)

func main() {
	http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
		fmt.Fprintf(w, "Hello, %q", html.EscapeString(r.URL.Path))
		log.Println("call to;", html.EscapeString(r.URL.Path))
	})
	http.ListenAndServe(":8080", nil)
}