updated readme.md

Author: vmartynets

00-Starter-Seed/README.md

@@ -8,6 +8,8 @@ To run the sample, make sure you have `python` and `pip` installed.
 
 Rename `.env.example` to `.env` and populate it with the client ID, domain, and secret for your Auth0 app. Also, add the callback URL to the settings section of your Auth0 client.
 
+Register `http://localhost:3000/callback` as `Allowed Callback URLs` and `http://localhost:3000` as `Allowed Logout URLs` in your app settings.
+
 Run `pip install -r requirements.txt` to install the dependencies and run `python server.py`. The app will be served at [http://localhost:3000/](http://localhost:3000/).
 
 ## What is Auth0?