Ship Novya PWA with backend for deployable production use.

Fix production TypeScript builds and add DEPLOY.md so the app can be hosted from this repo.

Co-authored-by: Cursor <cursoragent@cursor.com>

backend/src/modules/auth/index.ts

@@ -0,0 +1,2 @@
+export { createAuthRoutes } from './auth.routes.js';
+export { requireAuth } from '../../middleware/auth.js';