open machine firewall for psql port

homelab-services/postgresql-db/flake.nix

@@ -155,6 +155,10 @@
             '';
             };
           };
+
+          networking.firewall.allowedTCPPorts = lib.mkMerge [
+            (lib.mkIf opts.enable [ opts.dataPort ])
+          ];
       };
     };
   };