chore(users): grfn -> aspen

Change-Id: I6c6847fac56f0a9a1a2209792e00a3aec5e672b9
Reviewed-on: https://cl.tvl.fyi/c/depot/+/10809
Autosubmit: aspen <root@gws.fyi>
Reviewed-by: sterni <sternenseemann@systemli.org>
Tested-by: BuildkiteCI
Reviewed-by: lukegb <lukegb@tvl.fyi>

users/aspen/xanthous/server/docker.nix

@@ -0,0 +1,21 @@
+{ depot ? import ../../../.. { }
+, pkgs ? depot.third_party.nixpkgs
+, ...
+}:
+
+let
+  inherit (depot.users.aspen) xanthous;
+  xanthous-server = xanthous.server;
+in
+pkgs.dockerTools.buildLayeredImage {
+  name = "xanthous-server";
+  tag = "latest";
+  contents = [ xanthous xanthous-server ];
+  config = {
+    Cmd = [
+      "${xanthous-server}/bin/xanthous-server"
+      "--xanthous-binary-path"
+      "${xanthous}/bin/xanthous"
+    ];
+  };
+}