feat(sapphire): blackhole original notes pages domain

nixos/server/git.nix

@@ -423,6 +423,14 @@ See:
         # serve from notes instead of main website
         middlewares = [ "redirect-notes-index" "replace-notes" ];
       };
+      # blackhole the original GitLab pages notes domain to ensure only the actual domain is used
+      pagesEisfunkeNotesBlackhole = {
+        rule = "Host(`notes-8efb78.pages.eisfunke.com`)";
+        priority = 9999;
+        entrypoints = [ "websecure" ];
+        tls.certResolver = "tls";
+        service = "unavailable";
+      };
       # the container registry
       registry = {
         rule = "Host(`registry.eisfunke.com`)";