Scraping StackOverflow's questions with Node.js

I'm new to node and web scraping in general but with some research I've written this working code.

My goal is to get all questions from X Stack Overflow's pages sorted by most rated and save that data locally to use on another project to plot charts and other analytical stuff.

How can I improve it in both readability and perfomance?
Any convention or language/technology nuance that I got wrong?

const CHEERIO = require('cheerio');
const REQUEST = require('request');
const JSONFRAME = require('jsonframe-cheerio');
const CORES = require('os').cpus().length;
const CLUSTER = require('cluster');
const FS = require('fs');
const LAST_PAGE_TO_SCRAPE = 10;
const QUANTITY_OF_PAGES_PER_WORKER = 1;

const BASE_URL = 'https://stackoverflow.com/questions?page=';
const URL_ORDERING = '&sort=votes';

if (CLUSTER.isMaster) {
    let nextPage = 1;
    for (let i = 0; i < CORES; i++) {
        CLUSTER.fork({ startingPoint: nextPage });
        nextPage += 1;
    }

    CLUSTER.on('online', (worker) => {
        console.log(`Worker ${worker.process.pid} is now working.`);
    });

    CLUSTER.on('exit', (worker, code, signal) => {
        if (code !== 0) {//restart
            console.log(`Worker ${worker.process.pid} died. Restarting.`);
            CLUSTER.fork({ startingPoint: worker.process.env.startingPoint });
        } else {//scrape next X pages
            console.log(`Worker ${worker.process.pid} finished it's work succesfully.`);
            if (nextPage <= LAST_PAGE_TO_SCRAPE) {
                CLUSTER.fork({ startingPoint: nextPage });
                nextPage += QUANTITY_OF_PAGES_PER_WORKER;
            }
        }
    });
} else {
    let workerStartingPoint = parseInt(process.env.startingPoint);
    for (let i = workerStartingPoint; i < workerStartingPoint + QUANTITY_OF_PAGES_PER_WORKER; i++) {
        REQUEST(BASE_URL + i + URL_ORDERING, function (error, response, html) {
            if (error) {
                process.exit(workerStartingPoint);//error code is where the worker should start again
            }
            let $ = CHEERIO.load(html);
            JSONFRAME($);
            let frame = {
                questions: {
                    _s: "#questions .question-summary",
                    _d: [{
                        "votes": ".statscontainer .stats .vote .votes .vote-count-post strong",
                        "answers": ".statscontainer .stats .status strong",
                        "views": ".statscontainer .views",
                        "title": ".summary h3 a",
                        "tags": [".summary .tags a"],
                        "url": ".question-hyperlink @ href",
                        "user": {
                            "name": ".summary .started .user-info .user-details a",
                            "profile-link": ".summary .started .user-info .user-details a @ href",
                            "reputation": ".summary .started .user-info .user-details .-flair .reputation-score"
                        },
                        "date asked": ".summary .started .user-info .user-action-time .relativetime"
                    }]
                }
            }
            let questions = $('body').scrape(frame, { string: true });
            FS.writeFile('page-' + i + '.json', questions, function (error) {
                if (error) {
                    process.exit(workerStartingPoint);
                }
                process.exit(0);
            })
        });
    }
}

If you're going to run this,don't set the LAST_PAGE_TO_SCRAPE too large because your IP is going to get temporarily blocked by SO.