in code/app/main.go [224:235]
func writeResponse(w http.ResponseWriter, status int, msg string) {
if status != http.StatusOK {
weblog(fmt.Sprintf(msg))
}
w.Header().Set("Content-Type", "application/json; charset=utf-8")
w.Header().Set("Access-Control-Allow-Headers", "Content-Type,access-control-allow-origin, access-control-allow-headers")
w.WriteHeader(status)
w.Write([]byte(msg))
return
}