nixos/prayer: Add port type

Changed files
+2 -1
nixos
modules
services
networking
+2 -1
nixos/modules/services/networking/prayer.nix
···
enable = mkEnableOption "the prayer webmail http server";
port = mkOption {
-
default = "2080";
+
default = 2080;
+
type = types.port;
description = ''
Port the prayer http server is listening to.
'';