system / architecture overview

[jpiesing]

Split out from #38

o Outside of being told "hey this is what you need to run" it's not clear what all is being run and why different components or technologies are used (docker, hostname, etc). Is there a good system/architecture overview document that can help people better understand what is all going on and how the build steps are pulling everything together?
o I mainly raise this because debugging why something is going wrong during the setup is going to be incredibly difficult for non-developers in my opinion.