feat(deertopia): Add Copyparty module

outputs/nixosConfigurations.nix

@@ -21,6 +21,7 @@ let
   mkHost = hostName:
     let system = import ../hosts/${hostName}/system.nix;
     in nixpkgs.lib.nixosSystem {
+      # Pass `inputs` to all modules as a 'special arg,' like `config` or `lib`.
       specialArgs = inputs;
       inherit system;
       modules = [
@@ -28,9 +29,11 @@ let
 
         inputs.self.nixosModules.default
 
+        # TODO: Move imports to their own respective modules.
         inputs.disko.nixosModules.disko
         inputs.sops-nix.nixosModules.sops
         inputs.impermanence.nixosModules.impermanence
+        inputs.copyparty.nixosModules.default
 
         # Directory name should always match host name.
         ({ ... }: { networking.hostName = hostName; })