Modular NixOS config using flakes

Config

The entry to the system config goes as follows:

• A nixosSystem defined under nixosConfigurations in flake.nix imports the hosts configuration.nix from hosts/
  • inputs should be passed in specialArgs
• The configuration.nix should
  • import the hardware-configuration.nix, modules/
  • define values for custom options which determine how the system gets configured
  • set networking.hostName and system.stateVersion
  • do other extra configuration as necessary, that isn't part of defined modules