Express server file to integrate a static application with the Azure App-Services service. (Error: Cannot GET /path)

server.js

const express = require('express');
const server = express();
const options = {
    index: ['index.html','hostingstart.html']
};

server.use('/', express.static(__dirname, options));

server.get('/*', (req, res) => {
  res.sendFile(__dirname + "/" + options.index[1]);
});

server.listen(process.env.PORT);

startup.sh

# Azure > App-Services > Configuration > General Settings > Startuo Command
pwd && cp -rf * /opt/startup/ && ls /opt/startup/ && pm2 start --no-daemon /opt/startup/server.js