Add hoster.by DNS provider

[butalex11]

This PR adds hoster.by as a DNS challenge provider in Nginx Proxy Manager.

What is included

• Added a new provider entry to backend/certbot/dns-plugins.json
• Provider display name: hoster.by
• Certbot plugin package: certbot-dns-hosterby
• Plugin full name: dns-hosterby

Background
A third-party Certbot plugin for hoster.by DNS challenge has been published on PyPI:

• package: certbot-dns-hosterby
• current version: 0.1.0

Why this change is needed
Users with domains managed at hoster.by currently cannot select this provider from the NPM UI for Let's Encrypt DNS challenge and wildcard certificates.

Notes

• This change only registers the provider in NPM
• No backend behavior was changed outside dns-plugins.json
• The plugin has been tested against the live hoster.by DNS API for TXT create, update, delete, and Certbot dry-run

[nginxproxymanagerci]

Docker Image for build 1 is available on DockerHub:

nginxproxymanager/nginx-proxy-manager-dev:pr-5485

Note

Ensure you backup your NPM instance before testing this image! Especially if there are database changes.
This is a different docker image namespace than the official image.

Warning

Changes and additions to DNS Providers require verification by at least 2 members of the community!