Add GnuPG module

hosts/nixos-testbed/configuration.nix

@@ -7,6 +7,13 @@
 
   sydnix = {
     filesystemType = "btrfs";
+
+    gpg.enable = true;
+
+    users.users = [
+      "crumb"
+    ];
+
     impermanence = {
       enable = false;
       directories = [
@@ -22,9 +29,7 @@
       device = "placeholderrrr";
       archiveLimit = 3;
     };
-    users.users = [
-      "crumb"
-    ];
+
     # niri.enable = true;
   };