Se parametrizan los endpoints

app.js

@@ -56,10 +56,10 @@ app.get('/Invoice', async (req, res) => {
   })
 })
 
-async function printPDF() {
+async function printPDF(id) {
   const browser = await puppeteer.launch({ headless: true });
   const page = await browser.newPage();
-  await page.goto('http://localhost:9091/Invoice?id=2', { waitUntil: 'networkidle0' });
+  await page.goto(`http://localhost:${port}/Invoice?id=${id}`, { waitUntil: 'networkidle0' });
   const pdf = await page.pdf({
     format: 'A4', displayHeaderFooter: true,
     headerTemplate: ``,
@@ -76,8 +76,8 @@ async function printPDF() {
 }
 
 app.get('/getAmazonInvoicePDF', async (req, res) => {
-  let file = [{ url: "http://localhost:9091/Invoice?id=2", name: 'AmazonInvoice.pdf' }];
-  printPDF().then(pdf => {
+  let file = [{ url: `http://localhost:${port}/Invoice?id=${req.query.id}`, name: 'AmazonInvoice.pdf' }];
+  printPDF(req.query.id).then(pdf => {
     res.set({ 'Content-Type': 'application/pdf', 'Content-Length': pdf.length })
     res.send(pdf)
   })