fixed server logic

server/index.ts

@@ -84,15 +84,9 @@ app.use((req, res, next) => {
   // Other ports are firewalled. Default to 5000 if not specified.
   // this serves both the API and the client.
   // It is the only port that is not firewalled.
-  const port = parseInt(process.env.PORT || "5000", 10);
-  httpServer.listen(
-    {
-      port,
-      host: "0.0.0.0",
-      reusePort: true,
-    },
-    () => {
-      log(`serving on port ${port}`);
-    },
-  );
+  const port = Number(process.env.PORT) || 5000;
+
+  httpServer.listen(port, "127.0.0.1", () => {
+    log(`serving on http://127.0.0.1:${port}`);
+  });
 })();