Server to return a screenhot of the page you pass in the URL like: http://localhost:3000/?url=https://demo.dotcms.com

server.js

const puppeteer = require('puppeteer');
const http = require('http');
const url = require('url');

const requestListener = async function (req, res) {
    try {
        const { href } = new URL(url.parse(req.url, true).query.url);
        const browser = await puppeteer.launch();
        const page = await browser.newPage();
        await page.setViewport({ width: 1024, height: 768 });
        await page.goto(href);
        const b64string = await page.screenshot({ encoding: "base64" });
        const buffer = Buffer.from(b64string, "base64");

        res.writeHead(200, {
            'Content-Type': 'image/png',
            'Content-Length': buffer.length
        });
        res.end(buffer);
        await browser.close();
    } catch {
        res.statusCode = 400;
        res.end('Url is bad')
    }
}

const server = http.createServer(requestListener);
server.listen(3000);