wireguard/home: Hardcode server’s IPv4 address

Some devices (like fuuko) sadly do not have IPv6 connectivity which
makes their connection fail.

modules/wireguard/home.nix

@@ -70,7 +70,8 @@ in
           {
             allowedIPs = [ "10.80.0.0/24" ];
             publicKey = peers."${serverHostName}".publicKey;
-            endpoint = "${serverHostName}.sbruder.de:51820";
+            #endpoint = "${serverHostName}.sbruder.de:51820"; # not possible because sadly not all devices have IPv6 connectivity
+            endpoint = "195.201.139.15:51820";
             persistentKeepalive = 25;
           }
         ];