Document the main development commands (#201)

Author: jacebrowning

README.md

@@ -2,13 +2,36 @@
 
 This repository is an open-source example of how to quickly get up and running with Zoo's Text-to-CAD API endpoints. It is built using [SvelteKit](https://kit.svelte.dev/).
 
-To get started
+## Getting Started
 
-create a `.env.development.local` following `.env.development`
+Create `.env.development.local` copying `.env.development` as an example.
 
-then
+Run the local development server:
 
 ```bash
 yarn
 yarn dev
 ```
+
+## Validating Changes
+
+Run static analysis:
+
+```bash
+yarn fmt
+yarn check
+yarn lint
+```
+
+Run unit tests:
+
+```bash
+yarn test:unit
+```
+
+Run end-to-end tests:
+
+```bash
+yarn playwright install
+yarn test:e2e
+```