Add docker to Unraid community application

[steve1977]

First of all, thanks for the development. This is great!!!

Would be great to see native support for Unraid by adding the docker container to Unraid's application.

Currently, it can installed via dockerhub, but think it would see wider use if added as community application.

[skyme5]

@steve1977 thanks for using magzdb. Currently I'm not much familiar with Unraid platform, but I think we can support this.