www/bunkerweb: add new port

BunkerWeb is an open-source next-generation web application firewall
(WAF) and security platform designed to protect and manage web services.

It provides integrated security features such as request filtering,
rate limiting, TLS management, GeoIP support and a web management
interface.

As this is a newly introduced port, users are encouraged to validate
their deployment before using it in production environments.

WWW: https://github.com/bunkerity/bunkerweb

Sponsored by: Netzkommune GmbH