Hey man, I recently added a debian VM and intalled a LAMP stack. There's a way to add a Unraid share that you mount in Debian.
I have a "Webhosting" folder in unraid that goes to my webservers www, kinda.
See this thread, it helped me:
However, i'm kinda looking at the apache/php container and the mariadb. I have them installed but havent paried them together. Havent had time to look into it.
Hope it helps