extra page or not full page, can get one full screan

[go-shafaq]

hello every one!
I'm trying to get one and full page but it is not working as I want
what I got as you can see in pictures if it's single page I'm getting white line in the footer, if I add 1 px it goes away to next page as in picture how ever there is not white line.

how can I get single, full page and with no-white line pdf?
there is my html file : https://github.com/abdullayev13/ett-pdf-gen/blob/main/index.voucher.html

it is my code:
https://github.com/abdullayev13/ett-pdf-gen/blob/main/tmp.js
`const puppeteer = require('puppeteer');
const fs = require('fs');

(async () => {

// Create a browser instance
const browser = await puppeteer.launch();

// Create a new page
const page = await browser.newPage();

//Get HTML content from HTML file
const html = fs.readFileSync('index.voucher.html', 'utf-8');
await page.setContent(html, {waitUntil: 'domcontentloaded'});

// To reflect CSS used for screens instead of print
await page.emulateMediaType('screen');

// Downlaod the PDF
const pdf = await page.pdf({
    path: 'result.pdf',
    printBackground: true,
    width: '595px',
    height: '842px',
});

// Close the browser instance
await browser.close();

})();`