server/src/Billing/Program.cs

using Microsoft.AspNetCore;
using Microsoft.AspNetCore.Hosting;
using Bit.Core.Utilities;
using Serilog.Events;

namespace Bit.Billing
{
    public class Program
    {
        public static void Main(string[] args)
        {
            WebHost
                .CreateDefaultBuilder(args)
                .UseStartup<Startup>()
                .ConfigureLogging((hostingContext, logging) =>
                    logging.AddSerilog(hostingContext, e =>
                    {
                        var context = e.Properties["SourceContext"].ToString();
                        if(e.Level == LogEventLevel.Information &&
                            (context.StartsWith("\"Bit.Billing.Jobs") || context.StartsWith("\"Bit.Core.Jobs")))
                        {
                            return true;
                        }

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