Example node server

server.js

import express from 'express';
import dotenv from 'dotenv';
import path from 'path';

const getConfigValue = (name, defaultValue) => {
    let result = process.env[name];
    return result ? result : defaultValue;
}

// Read configuration
dotenv.config({ silent: true });
let config = {
    port: getConfigValue('PORT', 3000)
}

// Express server
const server = express();
const indexHtml = path.resolve(__dirname, 'index.html');
server.get('/*', (req, res) => {
    res.sendFile(indexHtml);
});

server.listen(config.port, () => {
    console.log('Express server successfully started');
});

export default server;