Add SSL/TLS Support for HTTPS Connection

[Cedric-Froehner]

Currently, the reverse proxy only supports HTTP connections, which may not be suitable for production environments where security is paramount.

Proposed Changes:

1. Add SSL/TLS configuration options to the Nginx configuration
2. Include documentation for:
   • Setting up SSL certificates (both self-signed and from trusted CAs)
   • Configuring SSL parameters in nginx.conf
   • Redirecting HTTP to HTTPS
   • Best practices for SSL configuration
3. Update docker-compose.yml to:
   • Add port 443 mapping
   • Include volume mounts for SSL certificates
4. Add configuration examples for common scenarios:
   • Using Let's Encrypt certificates
   • Using existing certificates
   • Development setup with self-signed certificates

Technical Considerations:

• Maintain backward compatibility with HTTP-only setups
• Ensure secure default SSL parameters
• Consider automated certificate renewal processes
• Handle SSL certificate paths in Docker environment

Additional Context:

This enhancement would make the document provider more suitable for production deployments where data security is essential.