feat(networking): enable ssh publishing on avahi

modules/modules/networking.nix

@@ -1,4 +1,4 @@
-{ config, lib, ... }:
+{ config, lib, pkgs, ... }:
 with lib;
 with lib.hlissner;
 {
@@ -10,6 +10,13 @@ with lib.hlissner;
       services.avahi = {
         enable = true;
         nssmdns = true;
+        publish = {
+          enable = true;
+          userServices = true;
+        };
+        extraServiceFiles = {
+          ssh = "${pkgs.avahi}/etc/avahi/services/ssh.service";
+        };
       };
     }
   ];