SendSpin Redirector

Self-contained short-link service. Public domain: last-status-update.com

• POST /api/shorten — create a short link. The X-Shortener-Secret header is required if SHORTENER_SECRET is set on the server.
• GET /r/{keyword} — 302 redirect to destination (public, no secret needed).
• GET /api/shorten/stats — statistics.
• GET /health — service health.