Add info about adding a kernel to Jupyter notebook.

README.md

@@ -20,6 +20,13 @@ To install:
     conda activate straw2analysis
     ```
 
+   To use this environment in the Jupyter notebooks under `./exploration/`, 
+   you can select it under Kernel > Change kernel after running:
+   
+   ```shell
+   ipython kernel install --user --name=straw2analysis
+   ```
+
 2. Provide an .env file to be used by `python-dotenv` which should be placed in the top folder of the application 
    and should have the form: