feat: adds email to variables file

variables.nix

@@ -2,10 +2,12 @@
   lib,
   config,
   ...
-}: let
+}:
+let
   inherit (lib) mkOption types;
   inherit (config.liv) variables;
-in {
+in
+{
   options.liv.variables = {
     primaryDomain = mkOption {
       default = "liv.town";
@@ -20,5 +22,12 @@ in {
       readOnly = true;
       description = "Notification service";
     };
+
+    email = mkOption {
+      default = "liv@liv.town";
+      type = types.str;
+      readOnly = true;
+      description = "My primary email";
+    };
   };
 }