fix async issue where same port is considered open

ElectronNET.Host/main.js

@@ -99,10 +99,10 @@ function startSocketApiBridge(port) {
     server.listen(port, 'localhost');
     server.on('listening', function () {
         console.log('Electron Socket started on port %s at %s', server.address().port, server.address().address);
+        // Now that socket connection is established, we can guarantee port will not be open for portscanner
+        startAspCoreBackend(port);
     });
 
-    startAspCoreBackend(port);
-
     io.on('connection', (socket) => {
         global['electronsocket'] = socket;
         global['electronsocket'].setMaxListeners(0);