pdf-from-images.js

const fs = require('fs');
const PDFDocument = require('pdfkit');

// Create a document
const doc = new PDFDocument({
	margin: 0,
	size: [612, 1595]
});

// Pipe its output somewhere, like to a file or HTTP response
// See below for browser usage
doc.pipe(fs.createWriteStream('output.pdf'));

doc.image('page1.png', {
	width: 612
});


doc.addPage({
	margin: 0,
	size: [612, 1570]
})

doc.image('page2.png', {
	width: 612
});


// Finalize PDF file
doc.end();