update default server port

server/index.js

@@ -49,6 +49,6 @@ app.post('/api/create-order', async (req, res) => {
   }
 });
 
-app.listen(process.env.SERVER_PORT || 5000, () => {
+app.listen(process.env.SERVER_PORT || 4000, () => {
-  console.log(`Server running on port ${process.env.SERVER_PORT || 5000}`);
+  console.log(`Server running on port ${process.env.SERVER_PORT || 4000}`);
 });