Add auto reauth when failure

app.js

@@ -34,6 +34,7 @@ app.get('/', (req, res) => {
 });
 
 const client = new Client({
+  restartOnAuthFail: true,
   puppeteer: {
     headless: true,
     args: [
@@ -110,6 +111,10 @@ io.on('connection', function(socket) {
 
   client.on('disconnected', (reason) => {
     socket.emit('message', 'Whatsapp is disconnected!');
+    fs.unlinkSync(SESSION_FILE_PATH, function(err) {
+        if(err) return console.log(err);
+        console.log('Session file deleted!');
+    });
     client.destroy();
     client.initialize();
   });

index.html

@@ -25,6 +25,7 @@
 
 			socket.on('qr', function(src) {
 				$('#qrcode').attr('src', src);
+				$('#qrcode').show();
 			});
 
 			socket.on('ready', function(data) {