DotnetCoreOpen.PrerenderMiddleware

[skommareddi]

I am trying to follow the below step
Step 1: Use AddPrerenderConfig() in ConfigurationBuilder

var builder = new ConfigurationBuilder()
.SetBasePath(env.ContentRootPath)
.AddJsonFile("appsettings.json", optional: true, reloadOnChange: true)
.AddJsonFile($"appsettings.{env.EnvironmentName}.json", optional: true)
// Prerender Step 1: Add Prerender configuration Json file.
.AddPrerenderConfig()
.AddEnvironmentVariables();

This looks a bit outdated. I have the below
public class Startup
{
public Startup(IConfiguration configuration)
{
Configuration = configuration;
}

Below from program
public static IHostBuilder CreateHostBuilder(string[] args) =>
Host.CreateDefaultBuilder(args)
.ConfigureWebHostDefaults(webBuilder =>
{

                webBuilder.UseStartup<Startup>();
            });
}

What would be the best way to .AddPrerenderConfig()