node.js api webserver

server.js

const express = require('express');
const cors = require('cors');
const bodyParser = require('body-parser');
const app = express();

const PORT = process.env.PORT || 3000;

app.use(cors());
app.use(bodyParser.urlencoded({extended: false}));
app.use(bodyParser.json());

app.get('/', (req, res, next) => {
   res.status(200).json({ok: true});
});

app.listen(PORT, () => {
    console.log("listening on port " + PORT);
});