Add of pangolin client, fix roundcube and vaultwarden, refractor some bit

module/newt.nix

@@ -0,0 +1,16 @@
+ {config,lib, ... }:
+
+{
+  services.newt = {
+     enable = true;
+     environmentFile = "/etc/newt.env";
+     settings = {
+       endpoint = "https://pangolin.wateir.fr";
+     };
+  };
+
+  networking.firewall = {
+    allowedTCPPorts = [ 80 443 ];
+    allowedUDPPorts = [ 51820 21820 ];
+  };
+}