Convert html file into image using Google puppeteer

html2image.js

const puppeteer = require('puppeteer');
const resolve = require("path").resolve;

// node html2image.js -i input.html -o output.png
(async () => {
    var program = require("commander");

    program
        .version("0.1.0")
        .option("-i, --input <path>", "input html")
        .option("-o, --output <path>", "output image file")
        .parse(process.argv)

    const htmlPath = resolve(program.input)
    console.log(htmlPath)

    const browser = await puppeteer.launch();
    const page = await browser.newPage();
    await page.goto('file://' +resolve(program.input));
    await page.screenshot({
        path: program.output
    });

    await browser.close();
})();

package.json

{
  "dependencies": {
    "commander": "^2.19.0",
    "puppeteer": "^1.12.2"
  }
}