Nginx reverse proxy + HTTPS(Lets encrypt / Traefik)

Setup Nginx reverse proxy with HTTPS using Let's Encrypt SSL certificates.

**Requirements:**
- Configure Nginx as reverse proxy for Node.js backend
- Setup Let's Encrypt SSL certificate automation
- Configure SSL/TLS with security best practices
- Add HTTP to HTTPS redirect
- Setup security headers (HSTS, CSP, etc.)
- Configure compression and caching in Nginx

**Deliverables:**
- Nginx configuration file
- Let's Encrypt setup and certificate renewal automation
- SSL certificate configuration
- Security headers configuration
- Testing and verification of HTTPS setup