📚 Update README with detailed instructions for running the backend, using the Gamemaster API, and managing API keys

code/websites/pokedex.online/README.md

@@ -44,12 +44,46 @@ A modern Vue 3 web application for Pokemon Professors to manage tournaments, pro
 # Install dependencies
 npm install
 
-# Start development server (API key can be set via UI now!)
+# Start development server WITH backend API:
+npm run dev:full
+
+# Or start just the frontend (no backend):
 npm run dev
 
 # Open browser to http://localhost:5173
 ```
 
+**Backend Server**: When running `npm run dev:full`, the OAuth proxy and Gamemaster API start automatically on port 3001.
+
+### Gamemaster API
+
+The Gamemaster API provides access to Pokemon GO gamemaster data from PokeMiners:
+
+```javascript
+import { gamemasterClient } from './gamemaster-client.js';
+
+// Get filtered pokemon (base forms + regional variants)
+const pokemon = await gamemasterClient.getPokemon();
+
+// Get all forms including costumes and variants
+const allForms = await gamemasterClient.getAllForms();
+
+// Get all moves
+const moves = await gamemasterClient.getMoves();
+
+// Check what's available
+const status = await gamemasterClient.getStatus();
+```
+
+**Workflow**:
+1. Open the **Gamemaster Manager** at `/gamemaster`
+2. Click "Fetch from PokeMiners" to download latest data
+3. Click "Process & Break Up Data" to categorize
+4. Click "Save All Files to Server" to make available to all apps
+5. Other apps can now access via the GamemasterClient
+
+See [GAMEMASTER_API.md](GAMEMASTER_API.md) for full documentation and examples.
+
 **API Key Setup** (two options):
 1. **Option 1: UI-based (Recommended)** - Use the API Key Manager tool at `/api-key-manager` to store your key locally in the browser
 2. **Option 2: Environment-based** - Create `.env` file (see Environment Setup section below) for CI/CD or shared development