How to use promise

promise.js

var Q = require('q');
var request = require('request');
var cheerio = require('cheerio');

function getArticleUrlPerPage(pageNumber, articleUrls) {

    var deferred = Q.defer();

    var options = {
        method: 'GET',
        url: 'https://www.getnewsmart.com/?last_time_title=This+week&page=' + pageNumber + '&section=&xhr=true',
    };

    request(options, function(error, response, body) {
        if (error) throw new Error(error);
        $ = cheerio.load(body);
        $('.text-wrapper').each(function(i, elem) {
            articleUrls.push($(this).find('.pjax-link').attr('href'));
        });
        
        deferred.resolve();
        
    });

    return deferred.promise;
}

var articleUrls = [];
var promises = [];
function getArticleUrlWholeSite() {
    console.log('Starting to get article urls');

    for (var pageNumber = 1; pageNumber <= 64; pageNumber++) {
        promises.push(getArticleUrlPerPage(pageNumber, articleUrls)
        .then(function() {
            console.log(articleUrls.length);
        }));
    }
    
    Q.allSettled(promises).then(function() {
        console.log('End getArticleUrlWholeSite');
    });

}

getArticleUrlWholeSite();