Correct server executing file

+const express = require('express');
+const fs = require('fs');
+const path = require('path');
+const HTTPS = require('https');
+
+const app = express();
+const domain = "www.probability.simulator.mooo.com"
+const sslport = 23023;
+
+app.get('/', function (req, res) {
+    fs.readFile("list.html", function (error, data){
+        res.writeHead(200, {"Content-Type" : "text/html"});
+        res.end(data);
+    });
+});
+
+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);
+}
+