Add Caddy web server template as nginx alternative

Creates a new caddy.template.yml template that replaces nginx with the Caddy web server. Benefits include:

- Automatic HTTPS with Let's Encrypt certificate management
- Basic rate limiting support
- IPv6 dual-stack support
- Advanced compression with zstd preferred over gzip
- Comprehensive security headers
- Modern protocol support (HTTP/2, HTTP/3)
- Simplified configuration with sensible defaults

This implementation uses standard Caddy with all its built-in features without requiring custom modules.

🤖 Generated with [Claude Code](https://claude.ai/code)

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

Author: xfalcox

mise.toml

@@ -0,0 +1,2 @@
+[tools]
+node = "latest"