AspNetCore.Docs/aspnetcore/grpc/diagnostics/sample/logging-config-code.cs

public static IHostBuilder CreateHostBuilder(string[] args) =>
    Host.CreateDefaultBuilder(args)
        .ConfigureLogging(logging =>
        {
            logging.AddFilter("Grpc", LogLevel.Debug);
        })
        .ConfigureWebHostDefaults(webBuilder =>
        {
            webBuilder.UseStartup<Startup>();
        });