SF_14.1, SF_14.2, SF_14.3 - https://www.progress.com/documentation/sitefinity-cms/upload-large-files-in-forms

program_cs_renderer.cs

using Microsoft.AspNetCore.Hosting;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.Hosting;
using Microsoft.Extensions.Logging;
using NewNugs;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;

namespace Renderer
{
    public class Program
    {
        public static void Main(string[] args)
        {
            CreateHostBuilder(args).Build().Run();
        }

        public static IHostBuilder CreateHostBuilder(string[] args) =>
            Host.CreateDefaultBuilder(args)
                .ConfigureWebHostDefaults(webBuilder =>
                {
                    //Large file upload
                    webBuilder.UseStartup<Startup>()
                    .UseKestrel((x => {
                    x.Limits.MaxRequestBodySize = 2147483648;
                });
    }
}