1. Create MySQL database + user + ALL PRIVILEGES.
2. Upload project outside public_html when possible.
3. Copy .env.example to .env and fill every CHANGE_THIS value.
4. Create Node.js 22 app; startup file: app.js.
5. Run: npm install --omit=dev
6. Restart application.
7. Open admin panel; configure Admin API URL/key.
8. Add admin WhatsApp number in international format without +.
9. Scan QR.
10. Add cPanel Cron every 10 minutes:
    /usr/bin/curl -fsS -H "X-Cron-Secret: YOUR_CRON_SECRET" "https://YOUR-DOMAIN/internal/cron/partial" >/dev/null 2>&1