Add ca host

flake.nix

@@ -200,6 +200,22 @@
             sops-nix.nixosModules.sops
           ];
         };
+        ca = nixpkgs.lib.nixosSystem {
+          inherit system;
+          specialArgs = {
+            inherit inputs self sops-nix;
+          };
+          modules = [
+            (
+              { config, pkgs, ... }:
+              {
+                nixpkgs.overlays = [ overlay-unstable ];
+              }
+            )
+            ./hosts/ca
+            sops-nix.nixosModules.sops
+          ];
+        };
       };
     };
 }