nginx: fix up

hosts/nginx/configuration.nix

@@ -13,7 +13,7 @@
     ];
 
 
-  networking.hostName = "vault";
+  networking.hostName = "nginx";
 
   # This value determines the NixOS release from which the default
   # settings for stateful data, like file locations and database versions
@@ -26,6 +26,8 @@
   # Additional packages
   environment.systemPackages = with pkgs; [];
 
+  networking.firewall.allowedTCPPorts = [ 80 443 ];
+
   services.nginx = {
     enable = true;
     recommendedProxySettings = true;