node.js - How to display a greet message include text and image in nodejs -

i want show greeting message when user start conversation on facebook messenger before user input message.

i did code in node js server triggers when user sends message want show greeting message below.

i want know should code welcome message. read https://developers.facebook.com/docs/messenger-platform/thread-settings/greeting-text here text possible.

this link text greeting facebook messenger :how show greeting message when start conversation

if using nodejs, use request (or curl) create greeting button , pass parameter listen on post back.

let request = require('request');  request.post({     method: 'post',     uri: `https://graph.facebook.com/v2.6/me/thread_settings?access_token=${access_token}`,     qs: {         setting_type: 'call_to_actions',         thread_state: 'new_thread',             call_to_actions: [{                 payload: 'get_start'             }]         },     json: true }, (err, res, body) => {     // deal response }); 

after that, can listen post called 'get_start' , return welcome message.

request({     method: 'post',     uri: 'https://graph.facebook.com/v2.6/me/messages',     qs: {         access_token: access_token     },     json: {         recipient: {             id: sender_id         },         message: {             attachment: {                 type: "template",                 payload: {                     template_type: "generic",                     elements: {                         "title": "your title",                         "subtitle": "welcome messenger bot",                         "image_url": "https://mybot.example.com/images/logo.jpg"                     }                 }             }         }     } }, (err, res, body) => {     // deal response });