Add this docker on Unraid AppCommunity

[thymon13]

Hello there !

Please add this great app in UNRAID : https://unraid.net/community/apps

[bpatrik]

If more people request it, I will consider doing so. Also pls provide steps to be taken,

[rhatguy]

I think this is basically complete. I'm running pigallery2 in unraid successfully from the below repo.

https://github.com/ItJustFox/unraidtemplate/tree/main/PiGallery2

[bpatrik]

I see it uses nightly-debian-buster. Its not good,, but not terrible. I will leave as it is.