Clean up montalin configuration

host/montalin/default.nix

@@ -0,0 +1,26 @@
+{ config, pkgs, ... }:
+{
+
+  imports = [
+    ./networking.nix
+    ./filesystems.nix
+    ./database.nix
+    ./backup.nix
+    ./applications
+
+    ../hardware/nuc.nix
+
+    ../role/base
+    ../role/dropbear
+  ];
+
+  # Set your time zone.
+  # time.timeZone = "Europe/Amsterdam";
+
+  # This value determines the NixOS release with which your system is to be
+  # compatible, in order to avoid breaking some software such as database
+  # servers. You should change this only after NixOS release notes say you
+  # should.
+  system.stateVersion = "19.09"; # Did you read the comment?
+
+}