ops/{deploy,nixos}: init, add prod1
This adds a set of base NixOS configurations and a machine that uses them (prod1.i.fediventure.net).
To build the configuration you can:
nix-build -A ops.deploy.configurations.prod1
This has been added as a CI target.
A follow-up to this will be a tool to automate deployment of built configurations, and documentation on how to use all of this.