fix: Update appsettings.example.json to include server URLs

src/EchoHub.Server/Program.cs

@@ -13,16 +13,31 @@ using Microsoft.EntityFrameworkCore;
 using Microsoft.IdentityModel.Tokens;
 using Serilog;
 
-// ── First-run setup ──────────────────────────────────────────────────────────
+// ── First-run setup (once) ──────────────────────────────────────────────────
 FirstRunSetup.EnsureAppSettings();
 
+// ── Bootstrap logger (replaced by full Serilog once host starts) ────────────
+Log.Logger = new LoggerConfiguration()
+    .WriteTo.Console()
+    .CreateBootstrapLogger();
+
+// ── Auto-restart loop ───────────────────────────────────────────────────────
+const int maxConsecutiveFailures = 5;
+var consecutiveFailures = 0;
+
+while (true)
+{
+    var startTime = DateTimeOffset.UtcNow;
+
+    try
+    {
         var builder = WebApplication.CreateBuilder(args);
 
-// ── Serilog ──────────────────────────────────────────────────────────────────
+        // ── Serilog ──────────────────────────────────────────────────────────
         builder.Host.UseSerilog((context, config) =>
             config.ReadFrom.Configuration(context.Configuration));
 
-// ── SQLite + EF Core ──────────────────────────────────────────────────────────
+        // ── SQLite + EF Core ─────────────────────────────────────────────────
         var defaultDbPath = Path.Combine(AppContext.BaseDirectory, "echohub.db");
         var connectionString = builder.Configuration.GetConnectionString("DefaultConnection")
             ?? $"Data Source={defaultDbPath}";
@@ -30,7 +45,7 @@ var connectionString = builder.Configuration.GetConnectionString("DefaultConnect
         builder.Services.AddDbContext<EchoHubDbContext>(options =>
             options.UseSqlite(connectionString));
 
-// ── JWT Authentication ────────────────────────────────────────────────────────
+        // ── JWT Authentication ───────────────────────────────────────────────
         var jwtSecret = builder.Configuration["Jwt:Secret"]
             ?? throw new InvalidOperationException("Jwt:Secret must be configured.");
         var jwtIssuer = builder.Configuration["Jwt:Issuer"] ?? "EchoHub.Server";
@@ -74,11 +89,11 @@ builder.Services.AddAuthentication(options =>
 
         builder.Services.AddAuthorization();
 
-// ── Controllers + SignalR ───────────────────────────────────────────────────────
+        // ── Controllers + SignalR ────────────────────────────────────────────
         builder.Services.AddControllers();
         builder.Services.AddSignalR();
 
-// ── Services ──────────────────────────────────────────────────────────────────
+        // ── Services ─────────────────────────────────────────────────────────
         builder.Services.AddSingleton<JwtTokenService>();
         builder.Services.AddSingleton<PresenceTracker>();
         builder.Services.AddSingleton<ImageToAsciiService>();
@@ -89,7 +104,7 @@ builder.Services.AddHttpClient("ImageDownload", client =>
             client.MaxResponseContentBufferSize = 10 * 1024 * 1024; // 10 MB
         });
 
-// ── Rate Limiting ────────────────────────────────────────────────────────────
+        // ── Rate Limiting ────────────────────────────────────────────────────
         builder.Services.AddRateLimiter(options =>
         {
             options.RejectionStatusCode = StatusCodes.Status429TooManyRequests;
@@ -116,7 +131,7 @@ builder.Services.AddRateLimiter(options =>
             });
         });
 
-// ── CORS ─────────────────────────────────────────────────────────────────────
+        // ── CORS ─────────────────────────────────────────────────────────────
         var allowedOrigins = builder.Configuration.GetSection("Cors:AllowedOrigins").Get<string[]>();
 
         builder.Services.AddCors(options =>
@@ -134,19 +149,49 @@ builder.Services.AddCors(options =>
             });
         });
 
-var app = builder.Build();
+        await using var app = builder.Build();
 
-// ── Database initialization ───────────────────────────────────────────────────
+        // ── Database initialization ──────────────────────────────────────────
         await DatabaseSetup.InitializeAsync(app.Services);
 
-// ── Middleware ─────────────────────────────────────────────────────────────────
+        // ── Middleware ────────────────────────────────────────────────────────
         app.UseCors();
         app.UseRateLimiter();
         app.UseAuthentication();
         app.UseAuthorization();
 
-// ── Routing ───────────────────────────────────────────────────────────────────
+        // ── Routing ──────────────────────────────────────────────────────────
         app.MapControllers();
         app.MapHub<ChatHub>(HubConstants.ChatHubPath);
 
-app.Run();
+        await app.RunAsync();
+
+        // Graceful shutdown (Ctrl+C) — exit the loop
+        Log.Information("Server shut down gracefully");
+        break;
+    }
+    catch (Exception ex)
+    {
+        var uptime = DateTimeOffset.UtcNow - startTime;
+
+        // If server ran for over 60 seconds, it's a runtime crash — reset failure count
+        if (uptime.TotalSeconds > 60)
+            consecutiveFailures = 0;
+
+        consecutiveFailures++;
+        Log.Fatal(ex, "Server crashed after {Uptime:g} (failure {Count}/{Max})",
+            uptime, consecutiveFailures, maxConsecutiveFailures);
+
+        if (consecutiveFailures >= maxConsecutiveFailures)
+        {
+            Log.Fatal("Too many consecutive failures, server will not restart");
+            break;
+        }
+
+        var delaySeconds = Math.Min(Math.Pow(2, consecutiveFailures), 30);
+        Log.Information("Restarting server in {Delay}s...", delaySeconds);
+        await Task.Delay(TimeSpan.FromSeconds(delaySeconds));
+    }
+}
+
+Log.CloseAndFlush();

src/EchoHub.Server/appsettings.example.json

@@ -1,4 +1,5 @@
 {
+  "Urls": "http://0.0.0.0:5000",
   "ConnectionStrings": {
     "DefaultConnection": "Data Source=echohub.db"
   },