Add mosh to server

And add server module.

hosts/alt/configuration.nix

@@ -10,6 +10,7 @@
       (modulesPath + "/virtualisation/proxmox-lxc.nix")
       ../modules/base.nix
       ../modules/kafka-mounts.nix
+      ../modules/server.nix
     ];
 
   nix.settings = { sandbox = false; };

hosts/modules/server.nix

@@ -0,0 +1,5 @@
+{ config, pkgs, inputs, ... }:
+{
+  # enable mosh
+  programs.mosh.enable  = true;
+}