Start a simple node Http server for testing puposes.

JsonHttpServer.js

/**
 * Installation: npm install express path
 *
 * Create file json/users.json
 * [
 *   {
 *     "name": "Marco",
 *     "description": "Test"
 *   },{
 *     "name": "Another",
 *     "description": "User"
 *   }
 * ]
 *
 * Run with: $> node JsonHttpServer.js 8081
 * 
 * Links:
 *  - http://expressjs.com/en/4x/api.html
 */

var express = require('express'),
    path = require('path'),
    app = express(),
    port = process.argv[2] || 8080;

app.get('/api/users', function (req, res) {
    res.set('Access-Control-Allow-Origin', '*');
    res.type('json');
    res.sendFile(path.join(__dirname, 'json/users.json'));
});

app.get('/api/users/marco', function (req, res) {
    const usersFile = path.join(__dirname, 'json/users.json');
    const users = require(usersFile);

    res.set('Access-Control-Allow-Origin', '*');
    res.type('json');
    res.send(users.find(user => user.name === "Marco"));
});

app.listen(port, function() {
    console.log('Listening on port %d', port);
});