Adding console log on sandbox server startup (#2210)

* Adding console log on sandbox server startup

* Update server.js

Add server error handeling

* Update server.js

Better error message, remove retry.

Co-authored-by: Philippe Recto <precto1285@gmal.com>
Co-authored-by: Felipe Martins <felipewmartins@gmail.com>
Co-authored-by: Jay <jasonsaayman@gmail.com>

sandbox/server.js

@@ -54,8 +54,8 @@ server = http.createServer(function (req, res) {
         console.error('Error:', e.message);
         status = 400;
         result = {
-           error: e.message
-         };
+          error: e.message
+        };
       }
 
       res.writeHead(status, {
@@ -69,4 +69,12 @@ server = http.createServer(function (req, res) {
   }
 });
 
-server.listen(3000);
+const PORT = 3000;
+
+server.listen(PORT, console.log(`Listening on localhost:${PORT}...`));
+server.on('error', (error) => {
+  if (error.code === 'EADDRINUSE') {
+    console.log(`Address localhost:${PORT} in use please retry when the port is available!`);
+    server.close();
+  }
+});