[printing] Setup dynamic printer config

roles/printing/default.nix

@@ -10,6 +10,10 @@ with lib;
   config = {
     services.printing.enable = true;
 
-    # TODO: Add actual printer setup config here...
+    services.avahi = {
+      enable = true;
+      nssmdns4 = true;
+      openFirewall = true;
+    };
   };
 }