How to save log in file in .net core worker service?

nowadays, I am working on a .Net core worker service and I'd like to save my project's errors in a file (text file) I couldn't find any settings for this

.ConfigureLogging((hostingContext, logging) =>
{ 
    logging.AddConfiguration(hostingContext.Configuration.GetSection("Logging"));

    logging.AddEventLog(new EventLogSettings()
    {
        SourceName = "CallerTestCacheServiceCoreAPI",
        LogName = "CallerTestCacheServiceCoreAPILog",                     
    });
})

I added an extension method in another class like this project https://github.com/MV10/Serilog.Dependency.Injection

public static IServiceCollection AddSerilogServices(this IServiceCollection services)
{
    return services.AddSerilogServices(
        new LoggerConfiguration()
            .MinimumLevel.Verbose()
            .WriteTo.File("log.txt")
            //.WriteTo.File(new CompactJsonFormatter(), "log.txt")
            .WriteTo.Console());
}

and introduce it in program.cs services

services.AddSerilogServices();

and in my worker class:

readonly Serilog.ILogger _log;

public Worker(  Serilog.ILogger log)
{  
    _log = log;
    log.Information("Hello World!");  
}

and it worked