avahi and just use docker on Parzival

hosts/common/core/avahi.nix

@@ -0,0 +1,10 @@
+{lib, ...}: {
+  services.avahi = lib.mkDefault {
+    enable = true;
+    nssmdns4 = true;
+    publish = {
+      enable = true;
+      domain = true;
+    };
+  };
+}

hosts/common/core/default.nix

@@ -28,6 +28,7 @@ in {
       "hosts/common/core/fonts.nix"
       "hosts/common/core/sudo.nix"
       "hosts/common/core/nebula.nix"
+      "hosts/common/core/avahi.nix"
       "hosts/common/core/dns.nix"
       "hosts/common/users/primary"
       "hosts/common/users/primary/${platform}.nix"

hosts/nixos/Parzival/default.nix

@@ -37,6 +37,7 @@
       "hosts/common/optional/gaming.nix"
       "hosts/common/optional/vbox.nix"
       "hosts/common/optional/printing.nix"
+      "hosts/common/optional/docker.nix"
       "modules/services/ollama"
     ])
   ];
@@ -48,25 +49,6 @@
     persistFolder = "/persist";
   };
 
-  specialisation = {
-    podman = {
-      inheritParentConfig = true;
-      configuration = let
-        podman = lib.custom.relativeToRoot "hosts/common/optional/podman.nix";
-      in {
-        imports = [podman];
-      };
-    };
-    docker = {
-      inheritParentConfig = true;
-      configuration = let
-        docker = lib.custom.relativeToRoot "hosts/common/optional/docker.nix";
-      in {
-        imports = [docker];
-      };
-    };
-  };
-
   networking = {
     networkmanager.enable = true;
     enableIPv6 = false;