Anonymous realtime collaborative pixel wall. The frontend is static and can be hosted on GitHub Pages. The backend uses Supabase Postgres, Realtime, and an Edge Function.

• index.html / styles.css / src/app.js: static GitHub Pages frontend
• config.js: runtime config for Supabase URL, publishable/anon key, and Edge Function URL
• supabase/schema.sql: tables, RLS, Realtime publication, and rate-limited RPC
• supabase/functions/paint/index.ts: paint API with basic anti-spam controls
• .github/workflows/pages.yml: GitHub Pages deployment workflow

1. Create a new Supabase Free project. Do not use voxpen-prod.
2. Run supabase/schema.sql in the SQL Editor.
3. Deploy the supabase/functions/paint Edge Function.
4. Fill config.js from config.example.js.
5. Push to GitHub and enable GitHub Pages with GitHub Actions as the source.