heagbokat e0247bc288 Fix case-insensitive auth and harden for production ...

- Fix login/register to treat usernames case-insensitively (HeagBoKaT == heagbokat) using LOWER() in SQL with JS .toLowerCase() for Unicode safety
- Add helmet for HTTP security headers and express-rate-limit on auth endpoints (20 req / 15 min) to prevent brute-force
- Lock CORS to ALLOWED_ORIGIN env var; warn if JWT_SECRET is the default dev key
- Serve built client/dist from Express so a single PM2 process handles everything
- Add deploy.sh, README.md with full first-run and auto-restart instructions, and server/.env.example

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

2026-06-25 23:29:06 +03:00

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