Change from local to https

+const fs = require('fs');
+const path = require('path');
+const HTTPS = require('https');
+const domain = "2019110627.osschatbot.ga";
+const sslport = 23023;
+
 var express = require('express');
 var app=express();
 var test=require('./test.js');
@@ -29,6 +35,23 @@ app.get("/",(req,res)=>{
 });
 
 /* server */
+try {
+    const option = {
+      ca: fs.readFileSync('/etc/letsencrypt/live/' + domain +'/fullchain.pem'),
+      key: fs.readFileSync(path.resolve(process.cwd(), '/etc/letsencrypt/live/' + domain +'/privkey.pem'), 'utf8').toString(),
+      cert: fs.readFileSync(path.resolve(process.cwd(), '/etc/letsencrypt/live/' + domain +'/cert.pem'), 'utf8').toString(),
+    };
+  
+    HTTPS.createServer(option, app).listen(sslport, () => {
+      console.log(`[HTTPS] Server is started on port ${sslport}`);
+    });
+  } catch (error) {
+    console.log('[HTTPS] HTTPS 오류가 발생하였습니다. HTTPS 서버는 실행되지 않습니다.');
+    console.log(error);
+  }
+  
+/* local server
 app.listen("8080",function(req,res){
     console.log('server listening at port no. 8080');
 });
+*/
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