update test system config

systems/default.nix

@@ -1,7 +1,7 @@
 { flake }:
 let
   nixpkgs = flake.inputs.nixpkgs;
-
+  
   # utility function to create a new nixos configuration
   # call like `mkSystem "x86_64-linux" "<hostname>.eh22.intern"`
   mkSystem =
@@ -13,6 +13,7 @@ let
         flake.inputs.home-manager.nixosModules.home-manager
         flake.inputs.sops-nix.nixosModules.default
         flake.inputs.lix.nixosModules.lixFromNixpkgs
+        flake.inputs.disko.nixosModules.default
 
         ../modules/base_system.nix
         ../modules/user_account.nix
@@ -36,6 +37,9 @@ let
     };
 in
 {
-  # exposed hosts at myroot
+  # prod hosts
+
+  # misc hosts
   "test.eh22.intern" = mkSystem "x86_64-linux" "test.eh22.intern";
+  "installer" = mkSystem "x86_64-linux" "installer";
 }