props/src/MultiShop/Server/Program.cs

using System;
using System.Collections.Generic;
using Microsoft.AspNetCore.Hosting;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.Hosting;

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

        public static IHostBuilder CreateHostBuilder(string[] args) =>
            Host.CreateDefaultBuilder(args)
                .ConfigureAppConfiguration((hostingContext, config) => 
                    config.AddInMemoryCollection(new Dictionary<string, string>() {
                        {"IdentityServer:Clients:MultiShop.Client:Profile", "IdentityServerSPA"}
                    })
                )
                .ConfigureWebHostDefaults(webBuilder =>
                {
                    webBuilder.UseStartup<Startup>();
                });
    }
}