made a home variable

configuration.nix

@@ -2,7 +2,8 @@
 let
   stateVersion = "24.05";
   unstable = import <nixos-unstable> {};
-  adNixPath = "/srv/appdaemon/ad-nix";
+  adHome = "/srv/appdaemon";
+  adNixPath = "${adHome}/ad-nix";
   adPath = "/usr/src/app";
   adBranch = "hass";
 in
@@ -53,11 +54,8 @@ in
 
   users.users.appdaemon = {
     isNormalUser = true;
-    home = "/srv/appdaemon";
-    extraGroups = [
-      "wheel"
-      "docker"
-    ];
+    home = "${adHome}";
+    extraGroups = [ "wheel" "docker"];
     openssh.authorizedKeys.keyFiles = [ "/root/.ssh/authorized_keys" ];
   };