Set DEFAULT_ACTIONS_URL to self

Fixes: #243
Reviewed-by: Rodrigo Arias Mallo <rodrigo.arias@bsc.es>

m/common/base/users.nix

@@ -134,7 +134,7 @@
         home = "/home/Computational/varcila";
         description = "Vincent Arcila";
         group = "Computational";
-        hosts = [ "apex" "hut" "tent" "fox" ];
+        hosts = [ "apex" "hut" "tent" "fox" "owl1" "owl2" ];
         hashedPassword = "$6$oB0Tcn99DcM4Ch$Vn1A0ulLTn/8B2oFPi9wWl/NOsJzaFAWjqekwcuC9sMC7cgxEVb.Nk5XSzQ2xzYcNe5MLtmzkVYnRS1CqP39Y0";
         openssh.authorizedKeys.keys = [
           "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIKGt0ESYxekBiHJQowmKpfdouw0hVm3N7tUMtAaeLejK vincent@varch"

m/tent/gitea.nix

@@ -21,6 +21,8 @@ in
       };
       log.LEVEL = "Warn";
 
+      actions.DEFAULT_ACTIONS_URL = "self";
+
       mailer = {
         ENABLED       = true;
         FROM          = "jungle-robot@bsc.es";