chore: initial project import

backend/probe/src/Monitor.Probe/Program.cs

@@ -0,0 +1,50 @@
+using Fleet.Core;
+using Fleet.Hosting;
+using Monitor.Probe;
+
+TimeProvider time = TimeProvider.System;
+INodeLog log = new ConsoleNodeLog(time);
+
+if (PlatformCheck.VerifyCrypto() is { } problem)
+{
+    log.Error("startup failed", ("err", problem));
+    return 1;
+}
+
+string configPath = "/etc/monitor/probe.json";
+for (int i = 0; i < args.Length - 1; i++)
+{
+    if (args[i] == "--config")
+    {
+        configPath = args[i + 1];
+    }
+}
+
+ProbeFile file;
+try
+{
+    file = NodeConfig.Load(configPath, ProbeConfigContext.Default.ProbeFile);
+    if (file.ProbeId.Length == 0 || file.PrivateKey.Length == 0)
+    {
+        throw new InvalidOperationException("probe.json needs probe_id and private_key (download it from the panel: POST /api/admin/probe/identity)");
+    }
+}
+catch (Exception ex) when (ex is IOException or InvalidDataException or InvalidOperationException or System.Text.Json.JsonException)
+{
+    log.Error("startup failed", ("err", ex.Message));
+    return 1;
+}
+
+string directory = Path.GetDirectoryName(Path.GetFullPath(configPath))!;
+try
+{
+    using var app = new ProbeApp(file, directory, time, log);
+    await ServiceShell.RunAsync(app.RunAsync, log);
+}
+catch (Exception ex) when (ex is FormatException or System.Security.Cryptography.CryptographicException)
+{
+    log.Error("startup failed", ("err", "private_key is not a valid PKCS#8 key: " + ex.Message));
+    return 1;
+}
+
+return 0;