how to create pure http server - in less than 20 code lines [golang] [20lines]

main.go

package main

import (
	"net/http"
)

const (
	jsonString = `{"hello": "world", "with_love": "from_go"}`
)

func handler(w http.ResponseWriter, r *http.Request) {
	w.Header().Set("Content-Type", "text/json")
	w.Write([]byte(jsonString))
}

func main() {
	http.HandleFunc("/", handler)
	http.ListenAndServe(":8765", nil)
}

output.txt

$ go run main.go &
[1] 56789
$ curl -s http://localhost:8765 | jq
{
  "hello": "world",
  "with_love": "from_go"
}
$ kill %1
[1]  + 56789 terminated  go run main.go