Download file with Puppeteer in Cloud Functions

readme.md

Cloud functions of Google only download file in folder "/tmp"

index.js

const puppeteer = require('puppeteer');
const urlLogin = 'https://myweb.com';

exports.getzip = async (req, res) => {
    const { user, pass, year, month } = req.body;
    console.log('Starting puppeteer...');
    const browser = await puppeteer.launch({ headless: true, slowMo: 100});
    try {
        const page = await browser.newPage();
        console.log('go to url login...');
        await page.goto(urlLogin);
        console.log('Insertdata login...');
        await page.type('#username', user);
        await page.type('#password', pass);
        await page.click('input[type="submit"]');
        console.log('Enter my platform...');
        await page.waitForSelector('#mContribuyentes_on');
        console.log('Autenticación exitosa');
        await page.click('#Contribuyente > table > tbody > tr:nth-child(6)');
        await page.goto(`https://myweb.com?filterDte.stateSuccess=Doc_OK&periodEmit=${year}-${month}`);
        await page.waitForTimeout(2000);
        console.log('Enable download...');
        await page._client.send('Page.setDownloadBehavior', {behavior: 'allow', downloadPath: '/tmp/'});
        await page.click('#datatable-responsive > thead > tr > th:nth-child(1) > input[type=checkbox]');
        await page.click('#resumenFERForm > div.col-md-12 > div:nth-child(1) > div > button:nth-child(3)');
        await page.waitForTimeout(7000);
        res.download('/tmp/dtes.zip');
    } catch (e) {
        console.log(e);
        res.status(200).send({ response: 'error'});
    } finally {
        await browser.close();
    }
}