Consolidate configuration and deployment code here

[preaction]

For whatever reason, I decided to scatter the configuration management code through every repository. This was a bad idea. The thought was that I could give others access to the cpantesters user account on machines and they could deploy, while I kept access to root more restricted. This has not happened, and likely will not happen. So all this has done is to make sharing configuration between repositories impossible, and there's been a few times where database configuration has gotten out of sync between repos, resulting in downtime.

So, we should consolidate all the configuration and deployment code in this repository. This includes all of the runit service files, Mojolicious app configuration files, Backend process container files, and anything else that might be considered configuration.

Keeping this all in one place should help future maintainers understand the system as a whole.