machines/sirius: add monitoring system

machines/sirius/configuration.nix

@@ -1,5 +1,6 @@
 {
   self,
+  pkgs,
   ...
 }:
 {
@@ -70,4 +71,22 @@
     ];
   };
 
+  systemd.services.heartbeat-push = {
+    description = "Heartbeat push to uptime monitor";
+    serviceConfig = {
+      Type = "oneshot";
+      ExecStart = "${pkgs.curl}/bin/curl -s -o /dev/null https://uptime.b4l.co.th/api/push/X0WCHAcY5gPf1U8If7BT1FLjpacZqGZu?status=up&msg=OK&ping=";
+    };
+  };
+
+  systemd.timers.heartbeat-push = {
+    description = "Heartbeat push timer";
+    wantedBy = [ "timers.target" ];
+    timerConfig = {
+      OnBootSec = "60s";
+      OnUnitActiveSec = "60s";
+      Unit = "heartbeat-push.service";
+    };
+  };
+
 }