Add Unraid Template

[drallgood]

I haven't done it before, and I would maybe need assistance from you if there were breaking changes that required retooling of the template, but I could create an Unraid template for this tool to allow easy docker installation by the Unraid community. I don't know if you're familiar with Unraid; it's a docker-enabled file server OS, with 100k users just in its Reddit community. Total Unraid user count is probably pretty high; it just had its 20 year anniversary as an operating system. Or, I'm sure you can also publish the Unraid template, if that's something you would rather do yourself, or of course you can decide you don't want that kind of attention at this time.

Originally posted by @hornofabraxas in #32