Move NGINX customization config to addon_configs folder

Hi all,

right now, the customizations for the official NGINX Proxy addon are stored in the /share folder.

I understand that a while ago there was the option introduced to keep addon configuration in the addon_configs folder - with the purpose of improving the backup-experience: Public Addon Config | Home Assistant Developer Docs

Would it be possible to adapt this for the NGINX addon? Unfortunately, I am not technically savvy enough to do this myself or to create a pull request.

Many thanks