feat: add foundry vtt to allerting

hosts/web-arm/modules/blackbox-exporter.nix

@@ -7,7 +7,9 @@ let
 
   cfg = config.services.blackbox-exporter;
   nginxVHosts = config.services.nginx.virtualHosts or {};
-  allDomains = lib.attrNames nginxVHosts;
+  allDomains = (lib.attrNames nginxVHosts) ++ [
+    "foundry-vtt.cloonar.com"
+  ];
   filteredDomains = builtins.filter (d: !builtins.elem d cfg.blacklistDomains) allDomains;
   httpsDomains = lib.map (d: "https://${d}") filteredDomains;
   domainsString = builtins.concatStringsSep "\n          "
@@ -45,8 +47,16 @@ in {
     # Configuration file for Blackbox Exporter
     environment.etc."blackbox_exporter/blackbox.yml".text = ''
       modules:
-        http_2xx:
+        http_200_final:
           prober: http
+          http:
+            method: GET
+            follow_redirects: true
+            preferred_ip_protocol: "ip4"   # <-- important: avoid blanket IPv6 failures
+            # optional: if you want to prefer v6 but fall back to v4, add:
+            # ip_protocol_fallback: true
+            valid_http_versions: ["HTTP/1.1", "HTTP/2.0"]  # tidy, not required but nice
+            valid_status_codes: [200]
     '';
 
     # Add scrape config for VictoriaMetrics agent
@@ -55,7 +65,7 @@ in {
         - job_name: "blackbox_http_all_domains"
           metrics_path: "/probe"
           params:
-            module: ["http_2xx"]
+            module: ["http_200_final"]
 
           static_configs:
             - targets: