Adding note about serverless URL for local setup

Author: ajosh0504

docs/30-dev-env/2-setup-pre-reqs.mdx

@@ -1,3 +1,11 @@
 # 👐 Setup prerequisites
 
-Replace any placeholders and run the cells under **Step 1: Setup prerequisites** section in the notebook.
+Replace any placeholders and run the cells under **Step 1: Setup prerequisites** section in the notebook.
+
+:::caution
+If running the lab locally, you will need to manually set the value of the `SERVERLESS_URL` variable as follows:
+
+```python
+SERVERLESS_URL = "https://vtqjvgchmwcjwsrela2oyhlegu0hwqnw.lambda-url.us-west-2.on.aws/"
+```
+:::