Open postgres port on psql1

clusters/psql1/default.nix

@@ -33,7 +33,9 @@ in {
           prefixLength = 24;
         } ];
       };
+      firewall.allowedTCPPorts = [ 5432 ];
     };
+
     services.postgresql = {
       enable = true;
       dataDir = "/data/postgresql";