eShopOnContainers/src/Services/Ordering/Ordering.BackgroundTasks/Program.cs

var appName = "Ordering.BackgroundTasks";
var builder = WebApplication.CreateBuilder(new WebApplicationOptions
{
    Args = args,
    ApplicationName = typeof(Program).Assembly.FullName
});
builder.Configuration.SetBasePath(Directory.GetCurrentDirectory());
builder.Configuration.AddJsonFile("appsettings.json", optional: true);
builder.Configuration.AddJsonFile($"appsettings.{builder.Environment.EnvironmentName}.json", optional: true);
builder.Configuration.AddEnvironmentVariables();
builder.Host.UseSerilog(CreateSerilogLogger(builder.Configuration));
builder.Services.AddCustomHealthCheck(builder.Configuration)
                .Configure<BackgroundTaskSettings>(builder.Configuration)
                .AddOptions()
                .AddHostedService<GracePeriodManagerService>()
                .AddEventBus(builder.Configuration);
var app = builder.Build();
if (app.Environment.IsDevelopment())
{
    app.UseDeveloperExceptionPage();
}
else
{
    app.UseExceptionHandler("/Home/Error");
}
app.UseRouting();

app.MapHealthChecks("/hc", new HealthCheckOptions()
{
    Predicate = _ => true,
    ResponseWriter = UIResponseWriter.WriteHealthCheckUIResponse
});
app.MapHealthChecks("/liveness", new HealthCheckOptions
{
    Predicate = r => r.Name.Contains("self")
});

try
{
    Log.Information("Starting web host ({ApplicationContext})...", Program.AppName);
    await app.RunAsync();

    return 0;
}
catch (Exception ex)
{
    Log.Fatal(ex, "Program terminated unexpectedly ({ApplicationContext})!", Program.AppName);
    return 1;
}
finally
{
    Log.CloseAndFlush();
}

Serilog.ILogger CreateSerilogLogger(IConfiguration configuration)
{
    var seqServerUrl = configuration["Serilog:SeqServerUrl"];
    var logstashUrl = configuration["Serilog:LogstashUrl"];
    return new LoggerConfiguration()
        .MinimumLevel.Verbose()
        .Enrich.WithProperty("ApplicationContext", Program.AppName)
        .Enrich.FromLogContext()
        .WriteTo.Console()
        .WriteTo.Seq(string.IsNullOrWhiteSpace(seqServerUrl) ? "http://seq" : seqServerUrl)
        .WriteTo.Http(string.IsNullOrWhiteSpace(logstashUrl) ? "http://logstash:8080" : logstashUrl, null)
        .ReadFrom.Configuration(configuration)
        .CreateLogger();
}

public partial class Program
{
    public static string Namespace = typeof(Program).Assembly.GetName().Name;
    public static string AppName = Namespace.Substring(Namespace.LastIndexOf('.', Namespace.LastIndexOf('.') - 1) + 1);
}