Parse an incoming Telegram request for webhook update.

parseTelegramRequest.go

// parseTelegramRequest handles incoming update from the Telegram web hook
func parseTelegramRequest(r *http.Request) (*Update, error) {
	var update Update
	if err := json.NewDecoder(r.Body).Decode(&update); err != nil {
		log.Printf("could not decode incoming update %s", err.Error())
		return nil, err
	}
	return &update, nil
}