timetagger: Make enable option with mkOption

Signed-off-by: Matthias Beyer <mail@beyermatthias.de>

nixos/modules/services/web-apps/timetagger.nix

@@ -8,7 +8,10 @@ in {
 
   options = {
     services.timetagger = {
-      enable = mkEnableOption ''
+      enable = mkOption {
+        type = types.bool;
+        default = false;
+        description = ''
           Tag your time, get the insight
 
           <note><para>
@@ -17,6 +20,7 @@ in {
             only allowed users have access.
           </para></note>
         '';
+      };
 
       bindAddr = mkOption {
         description = "Address to bind to.";