fix: make server url an environment variable

frontend/.env.example

@@ -3,7 +3,7 @@ CLERK_SECRET_KEY=
 NEXT_PUBLIC_LIVEBLOCKS_PUBLIC_KEY=
 LIVEBLOCKS_SECRET_KEY=
 
-NEXT_PUBLIC_SERVER_PORT=4000
+NEXT_PUBLIC_SERVER_URL=http://localhost:4000
 NEXT_PUBLIC_APP_URL=http://localhost:3000
 
 # Set WORKER_URLs after deploying the workers.

frontend/components/editor/index.tsx

@@ -44,7 +44,7 @@ export default function CodeEditor({
   // Initialize socket connection if it doesn't exist
   if (!socketRef.current) {
     socketRef.current = io(
-      `${window.location.protocol}//${window.location.hostname}:${process.env.NEXT_PUBLIC_SERVER_PORT}?userId=${userData.id}&sandboxId=${sandboxData.id}`,
+      `${process.env.NEXT_PUBLIC_SERVER_URL}?userId=${userData.id}&sandboxId=${sandboxData.id}`,
       {
         timeout: 2000,
       }