feat: Add Uptime Kuma monitoring service

modules/monitoring/default.nix

@@ -3,5 +3,6 @@
     ./grafana.nix
     ./loki.nix
     ./prometheus.nix
+    ./uptime-kuma.nix
   ];
 }

modules/monitoring/uptime-kuma.nix

@@ -0,0 +1,60 @@
+{
+  lib,
+  config,
+  pkgs,
+  ...
+}:
+let
+  cfg = config.my.monitoring.uptime-kuma;
+  port = 3001;
+in
+{
+
+  options.my.monitoring.uptime-kuma = {
+    enable = lib.mkEnableOption "Enable Uptime Kuma module";
+
+    proxy = {
+      enable = lib.mkEnableOption "Set the proxy entry for this service";
+
+      domain = lib.mkOption {
+        default = "example.com";
+        type = lib.types.str;
+        description = ''
+          The domain where Caddy is reachable
+        '';
+      };
+
+      host = lib.mkOption {
+        default = "localhost";
+        type = lib.types.str;
+        description = ''
+          host name where the service is running
+        '';
+      };
+
+    };
+  };
+
+  config = lib.mkMerge [
+    (lib.mkIf cfg.enable {
+
+      services.uptime-kuma = {
+        enable = true;
+        settings = {
+          HOST = "::";
+          PORT = toString port;
+        };
+      };
+
+    })
+
+    (lib.mkIf cfg.proxy.enable {
+      services.caddy = with cfg.proxy; {
+        virtualHosts."up.${domain}".extraConfig = ''
+          reverse_proxy http://${host}:${port}
+          import cloudflare
+        '';
+      };
+    })
+  ];
+}