No backend deployed yet? See backend-php/README.md in this download — or use local demo mode below without logging in (saves only to this browser).
Two ways to get a real, shared blog instead of the local-only demo: deploy backend-php/ (PHP + MySQL, log in with a username/password above) or the Cloudflare Worker in backend/cloudflare-worker-blog/ (paste its URL + admin token directly below). Either way, without one of these, posts save only to your own browser.