ADD: qr image on pain page

controllers/website.js

@@ -4,6 +4,7 @@ let fs = require('fs');
 let mustache = require('mustache');
 let lightning = require('../lightning');
 let logger = require('../utils/logger');
+var qr = require('qr-image');
 
 let lightningGetInfo = {};
 let lightningListChannels = {};
@@ -89,6 +90,13 @@ router.get('/', function(req, res) {
   return res.status(200).send(mustache.render(html, Object.assign({}, lightningGetInfo, lightningListChannels)));
 });
 
+router.get('/qr', function (req, res) {
+  const url = "bluewallet:setlndhuburl?url=" + encodeURIComponent(req.protocol + '://' + req.headers.host);
+  var code = qr.image(url, { type: 'png' });
+  res.setHeader('Content-type', 'image/png');
+  code.pipe(res);
+});
+
 router.get('/about', function(req, res) {
   logger.log('/about', [req.id]);
   let html = fs.readFileSync('./templates/about.html').toString('utf8');