text: const fs = require('fs');
  const pdf = require('html-pdf');
  const options = { format: 'Letter' };
  const html =``;
  
  pdf
      .create(html, options)
      .toFile('./ejemplo.pdf', function(err, res) {
  		if (err) return console.log(err);
  		console.log(res); // { filename: '/app/businesscard.pdf' }
  	});
  