server/src/Notifications/Program.cs

using Bit.Core.Utilities;
using Serilog.Events;

namespace Bit.Notifications;

public class Program
{
    public static void Main(string[] args)
    {
        Host
            .CreateDefaultBuilder(args)
            .ConfigureCustomAppConfiguration(args)
            .ConfigureWebHostDefaults(webBuilder =>
            {
                webBuilder.UseStartup<Startup>();
                webBuilder.ConfigureLogging((hostingContext, logging) =>
                    logging.AddSerilog(hostingContext, e =>
                    {
                        var context = e.Properties["SourceContext"].ToString();
                        if (context.Contains("IdentityServer4.Validation.TokenValidator") ||
                            context.Contains("IdentityServer4.Validation.TokenRequestValidator"))
                        {
                            return e.Level > LogEventLevel.Error;
                        }

                        if (e.Level == LogEventLevel.Error &&
                            e.MessageTemplate.Text == "Failed connection handshake.")
                        {
                            return false;
                        }

                        if (e.Level == LogEventLevel.Error &&
                            e.MessageTemplate.Text.StartsWith("Failed writing message."))
                        {
                            return false;
                        }

                        if (e.Level == LogEventLevel.Warning &&
                            e.MessageTemplate.Text.StartsWith("Heartbeat took longer"))
                        {
                            return false;
                        }

                        return e.Level >= LogEventLevel.Warning;
                    }));
            })
            .Build()
            .Run();
    }
}