diff --git a/.env.example b/.env.example
index 0cb3e5b..b62d747 100644
--- a/.env.example
+++ b/.env.example
@@ -1,3 +1,6 @@
+# App Configuration
+NEXT_PUBLIC_APP_URL=http://localhost:3000
+
 # Firebase Client Config (Browser-safe)
 NEXT_PUBLIC_FIREBASE_API_KEY=
 NEXT_PUBLIC_FIREBASE_AUTH_DOMAIN=