Add firewall rule for barrier

conf/workstation.nix

@@ -116,7 +116,9 @@
   };
 
   # Open ports in the firewall.
-  # networking.firewall.allowedTCPPorts = [ ... ];
+  networking.firewall.allowedTCPPorts = [
+    24800 # barrier
+  ];
   # networking.firewall.allowedUDPPorts = [ ... ];
   # Or disable the firewall altogether.
   # networking.firewall.enable = false;