Python backend setup (Spaceship cPanel)
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1) cPanel > Setup Python App:
   - Python 3.10+
   - Application root: the uploaded `backend-python` folder
   - Application URL: **/api** (recommended)
   - WSGI entry point: `app:app`
2) Click "Start App".
3) Upload `frontend/*` to `public_html`.
4) Open your domain — frontend auto-detects `/api`.

If you cannot mount at `/api`, proxy `/api` to your app path with `.htaccess`.
SQLite DB: `data.db` inside backend folder.
