nixos/users: port tuxcord.net motd

nixos/users.nix

@@ -45,8 +45,21 @@ lib.recursiveUpdate
     (lib.attrsToList users)
   ).options
   {
-    users.users.root = {
+    users = {
+      motd = ''
+                  __                                          __                      __
+        ---------/\ \__                                      /\ \                    /\ \__
+        ---------\ \ ,_\  __  __  __  _   ___    ___   _ __  \_\ \        ___      __\ \ ,_\
+        ----------\ \ \/ /\ \/\ \/\ \/'\ /'___\ / __`\/\`'__\/'_` \      /'_ `\  /'__`\ \ \/
+        -----------\ \ \_\ \ \_\ \/>  <//\ \__//\ \L\ \ \ \//\ \L\ \  __/\ \/\ \/\  __/\ \ \_
+        ------------\ \__\\ \____//\_/\_\ \____\ \____/\ \_\\ \___,_\/\_\ \_\ \_\ \____\\ \__\
+        -------------\/__/ \/___/ \//\/_/\/____/\/___/  \/_/ \/__,_ /\/_/\/_/\/_/\/____/ \/__/
+                                                    A friendly Linux community - est. July 2023
+      '';
+
+      users.root = {
         initialPassword = "tuxcord";
         openssh.authorizedKeys.keys = self.lib.adminSSHKeys;
       };
+    };
   }