Add kill commands

Dev Environment Setup Guide.md

@@ -250,6 +250,8 @@ All of the tools in this project are accessible as an npm task so you can intera
 | `start:docs` | This will start a local server on [localhost:6060](http://localhost:6060) showing you the React component documentation. As you change a components documentation file in `/src/components/<component_name>/<component_name>.md` you'll see your changes in the browser. |
 | `build:frontend` | This will output a static bundle of the frontend in `/build` that can be put on any webserver. |
 | `build:docs` | This will output a static bundle of the frontend documentation in `/styleguidist/frontend-docs` that can be put on any webserver. |
+| `kill:frontend` | Kills the runaway frontend process(es). |
+| `kill:api` | Kills the runaway API process(es). |
 | `venv:create` | This will create a virtual environment in `/api/venv` and install requirements from `/api/requirements.txt`. |
 | `venv:delete` | This will delete the folder `/api/venv`. |
 | `venv:reset` | This will run `venv:delete` then `venv:create`. |