update readme

Author: ben14136

README.md

@@ -5,3 +5,27 @@ Esri's next generation network technology, the utility network, is completely ba
 ## Slides and recording
 
 Most of the slides are made available at [Esri Events > Proceedings](https://www.esri.com/en-us/about/events/index/proceedings).
+
+## Getting Started
+
+1. Install the dependencies:
+
+   ```sh
+   npm install
+   ```
+
+2. Run the Vite dev server:
+
+   ```sh
+   npm run dev
+   ```
+
+3. Access the dev server by navigating to `http://localhost:5173/`.
+
+## Configuration
+
+Be sure to update the `id` property on the `arcgis-map` component in `index.html` with your own map ID:
+
+```html
+<arcgis-map item-id="map-id-goes-here"> </arcgis-map>
+```