server.js

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

// Allowing Access-Control-Allow-Origin
app.use(cors());
const corsOptions = {
    origin: 'http://localhost:4200',
    optionsSuccessStatus: 200
};

// BodyParser Middleware 
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({ extended: true }));

// CORS Middleware
app.use(cors(corsOptions))

// ROUTES
const recaptcha = require('./app/routes/recaptcha.routes');
app.use('/recaptcha', recaptcha);

// Create a Server
const server = app.listen(3000, function () {
    
    let host = server.address().address
    let port = server.address().port

  console.log("App listening at http://%s:%s", host, port)
})