add instructions to install requirements

README.md

@@ -5,5 +5,10 @@ These are developer-focused docs for using Brick to model buildings.
 ## Getting Started
 
 1. [Install JupyterBook](https://jupyterbook.org/intro.html#install-jupyter-book)
-2. Build docs: `jupyter book build .`
-3. Visit docs: `cd _build/html && python3 -m http.server`
+2. Install deps:
+    ```
+    pip install --user -r requirements.txt
+    jupyter sparqlkernel install
+    ```
+3. Build docs: `jupyter book build .`
+4. Visit docs: `cd _build/html && python3 -m http.server`