public IServiceProvider Setup()
{
    var builder = new ConfigurationBuilder()
         .SetBasePath(Directory.GetCurrentDirectory())
         .AddJsonFile("appsettings.json", optional: false, reloadOnChange: true)
         .AddJsonFile($"appsettings.{EnvironmentName}.json", optional: true, reloadOnChange: true)
         .AddEnvironmentVariables();

    var configuration = builder.Build();

    var services = new ServiceCollection();
    services.AddScoped((provider) => Configuration);
    services.AddScoped<ISomeOtherStuff, SomeOtherStuff>();

    services.AddLogging(logging => ServiceConfig.Logging.SetupLogger(EnvironmentName == "Development", logging, Configuration));

    IServiceProvider provider = services.BuildServiceProvider();

    return provider;
}