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Program.cs

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+using CatLink.Relay;
+
+var builder = WebApplication.CreateBuilder(args);
+
+// Add services
+builder.Services.AddControllers();
+builder.Services.AddEndpointsApiExplorer();
+builder.Services.AddSwaggerGen();
+
+var app = builder.Build();
+
+// Configure middleware
+if (app.Environment.IsDevelopment())
+{
+    app.UseSwagger();
+    app.UseSwaggerUI();
+}
+
+app.UseHttpsRedirection();
+app.UseAuthorization();
+app.MapControllers();
+
+// Get configuration
+var httpPort = builder.Configuration.GetValue<int>("HttpPort", 20100);
+var relayPort = builder.Configuration.GetValue<int>("RelayPort", 20101);
+
+var logger = app.Services.GetRequiredService<ILogger<Program>>();
+
+// Start TCP relay server
+var cts = new CancellationTokenSource();
+var relayTask = Task.Run(async () =>
+{
+    var relay = new FutariRelay(relayPort, cts.Token, app.Services.GetRequiredService<ILogger<FutariRelay>>(), app.Services);
+    await relay.StartAsync();
+}, cts.Token);
+
+logger.LogInformation("CatLink Relay Server starting...");
+logger.LogInformation("HTTP API listening on port {HttpPort}", httpPort);
+logger.LogInformation("TCP Relay listening on port {RelayPort}", relayPort);
+
+// Handle shutdown
+AppDomain.CurrentDomain.ProcessExit += (sender, e) =>
+{
+    logger.LogInformation("Shutting down...");
+    cts.Cancel();
+};
+
+// Run the web server
+app.Run($"http://0.0.0.0:{httpPort}");