Update documentation for Mapbox static maps and progressive enhancement

- Add MapImageService documentation to CLAUDE.md
- Update environment variable requirements for unrestricted Mapbox tokens
- Document new server-side routes (/table, /submit-report, /map-image.png)
- Add progressive enhancement section explaining JavaScript vs non-JavaScript modes
- Update technology stack to reflect accessibility-first approach
- Document auto-fit static map generation with color-coded pins

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

README.md

@@ -6,9 +6,12 @@ A community-driven web application for tracking winter road conditions and icy h
 
 - 🗺️ **Interactive Map** - Real-time location tracking centered on Grand Rapids
 - ⚡ **Fast Geocoding** - Lightning-fast address lookup with MapBox API
+- 🚫 **JavaScript-Free Mode** - Complete functionality without JavaScript via server-side rendering
+- 🖼️ **Static Maps** - Auto-generated Mapbox static images for non-JS users
 - 🔄 **Auto-Expiration** - Reports automatically removed after 48 hours
 - 👨‍💼 **Admin Panel** - Manage and moderate location reports
 - 📱 **Responsive Design** - Works on desktop and mobile devices
+- ♿ **Accessibility First** - Progressive enhancement with noscript fallbacks
 - 🔒 **Privacy-Focused** - No user tracking, community safety oriented
 - 🛡️ **Enhanced Security** - Coordinate validation, rate limiting, and content filtering
 
@@ -17,6 +20,7 @@ A community-driven web application for tracking winter road conditions and icy h
 ### Prerequisites
 - Node.js 18+ 
 - MapBox API token (free tier available)
+  - **Important**: For server-side static maps, use an unrestricted token (no URL restrictions)
 
 ### Local Development
 
@@ -89,7 +93,7 @@ SCSS files are organized in `src/scss/`:
 ## Environment Variables
 
 ```bash
-# Required for fast geocoding
+# Required for geocoding and static map generation
 MAPBOX_ACCESS_TOKEN=pk.your_mapbox_token_here
 
 # Admin panel access
@@ -99,6 +103,11 @@ ADMIN_PASSWORD=your_secure_password
 PORT=3000
 ```
 
+**MapBox Token Requirements:**
+- For interactive geocoding: Token can have URL restrictions
+- For server-side static maps: Must use unrestricted token (no URL restrictions)
+- Recommended: Use one unrestricted token for both features
+
 ## Deployment
 
 ### Automated Deployment (Debian 12 ARM64)
@@ -140,6 +149,15 @@ See `docs/deployment.md` for detailed manual deployment instructions.
 - `POST /api/locations` - Submit new location report (rate limited: 10/15min per IP)
 - `GET /api/config` - Get API configuration
 
+### Progressive Enhancement Routes
+- `GET /` - Main application page with JavaScript-enhanced features
+- `GET /table` - Non-JavaScript table view with static map and HTML forms
+- `POST /submit-report` - Server-side form submission for non-JavaScript users
+- `GET /map-image.png` - Dynamic static map generation using Mapbox Static Images API
+  - Query parameters: `?width=800&height=600&padding=50` for customization
+  - Auto-fit positioning centers on actual location coordinates
+  - Color-coded pins: red for regular reports, orange for persistent
+
 ### Admin Endpoints (Authentication Required)
 - `GET /admin` - Admin panel (password protected)
 - `GET /api/admin/locations` - Get all location reports
@@ -157,12 +175,16 @@ Interactive API documentation available at `/api-docs` when running the server.
 ## Technology Stack
 
 - **Backend:** Node.js, Express.js, SQLite, TypeScript
-- **Frontend:** Vanilla JavaScript, Leaflet.js
+- **Frontend:** Progressive Enhancement (Vanilla JavaScript + Server-side rendering)
+  - **Enhanced:** Leaflet.js interactive maps with real-time updates
+  - **Fallback:** Server-side HTML tables with static Mapbox images
 - **Geocoding:** MapBox API (with Nominatim fallback)
+- **Maps:** Leaflet.js (interactive) + Mapbox Static Images API (server-side)
 - **Security:** Rate limiting, input validation, authentication
 - **Testing:** Jest, TypeScript, 128+ tests with 76% coverage
 - **Reverse Proxy:** Caddy (automatic HTTPS)
 - **Database:** SQLite (lightweight, serverless)
+- **Accessibility:** Full progressive enhancement with noscript support
 
 ## Contributing