Implement reply function

-const express = require('express');
+var express = require('express');
+const request = require('request');
+const TARGET_URL = 'https://api.line.me/v2/bot/message/reply'
+const TOKEN = 'P5+e9JkPRckzKu1Fv7ghZl1MfP0wrYwYcgBVzHWe1OHO4Gtv1PIa9BARYqxoAThaXPSf8MyVKcpDE88V5jOnoS4o2xCNcgH9Ne4wcrPuNX6AT4gsfYEz0Y7n/A4+rT4vXHYARK34YPbkzzQbiXiyiQdB04t89/1O/w1cDnyilFU='
 const fs = require('fs');
 const path = require('path');
 const HTTPS = require('https');
 const domain = "2020105659.osschatbot.cf"
 const sslport = 23023;
 
-
-//Configure webhook
+//Webhook
 const bodyParser = require('body-parser');
-const app = express();
+var app = express();
 app.use(bodyParser.json());
-app.post('/hook', function (request, response) {
+app.post('/hook', function (req, res) {
 
-  var eventObj = request.body.events[0];
+  var eventObj = req.body.events[0];
   var source = eventObj.source;
   var message = eventObj.message;
 
   // request log
   console.log('======================', new Date() ,'======================');
-  console.log('[request]', request.body);
+  console.log('[request]', req.body);
   console.log('[request source] ', eventObj.source);
   console.log('[request message]', eventObj.message);
 
-  response.sendStatus(200);
+  //Reply
+  request.post(
+    {
+        url: TARGET_URL,
+        headers: {
+            'Authorization': `Bearer ${TOKEN}`
+        },
+        json: {
+            "replyToken":eventObj.replyToken,
+            "messages":[
+                {
+                    "type":"text",
+                    "text":"안녕하세요"
+                },
+                {
+                    "type":"text",
+                    "text":"끝말잇기봇입니다"
+                }
+            ]
+        }
+    },(error, response, body) => {
+        console.log(body)
+    });
+
+  res.sendStatus(200);
 });
 
-//Set SSL
+//SSL
 try {
     const option = {
       ca: fs.readFileSync('/etc/letsencrypt/live/' + domain +'/fullchain.pem'),