Add Ngrok instructions to README.md

README.md

@@ -17,6 +17,8 @@ Create your local environment with
 poetry install
 ```
 
+Ensure you have created and validated your account with [Ngrok](https://ngrok.com/).
+
 ### Make you Dataset
 
 `src/interview/data.py` contains an example function to build the classic [Iris dataset](https://scikit-learn.org/stable/auto_examples/datasets/plot_iris_dataset.html). You can build this with
@@ -33,4 +35,12 @@ Build the container and run the notebook with
 make build run
 ```
 
-This will copy your data and notebook to the container, install any packages you specified in your `pyproject.toml` file, then run the notebook in the container. Jupyter will be available on port 8888.
+This will copy your data and notebook to the container, install any packages you specified in your `pyproject.toml` file, then run the notebook in the container. Jupyter will be available on port 8888. Take not of the authentication token.
+
+### Setup a Tunnel
+
+Start Ngrok with `ngrok http 8888`. This will give you the URL you will share with the candidate, as illustrated below.
+
+![Ngrok](ngrok.png)
+
+By following this link the candidate can login to Jupyter Lab running in the container on your machine using the Jupyter authentication token you took note of above.