IW4M-Admin/WebfrontCore/Program.cs

using System;
using System.IO;
using System.Threading;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Hosting;
using Microsoft.Extensions.DependencyInjection;
using SharedLibraryCore.Configuration;
using SharedLibraryCore.Interfaces;
using WebfrontCore.Middleware;

namespace WebfrontCore
{
    public class Program
    {
        public static IManager Manager;
        private static IWebHost _webHost;

        public static IServiceProvider InitializeServices(Action<IServiceCollection> registerDependenciesAction, string bindUrl)
        {
            _webHost = BuildWebHost(registerDependenciesAction, bindUrl);
            Manager = _webHost.Services.GetRequiredService<IManager>();
            return _webHost.Services;
        }

        public static Task GetWebHostTask(CancellationToken cancellationToken)
        {
            var config = _webHost.Services.GetRequiredService<ApplicationConfiguration>();
            Manager.MiddlewareActionHandler.Register(null,
                new CustomCssAccentMiddlewareAction("#007ACC", "#fd7e14", config.WebfrontPrimaryColor,
                    config.WebfrontSecondaryColor), "custom_css_accent");
            
            return _webHost?.RunAsync(cancellationToken);
        }
        
        private static IWebHost BuildWebHost(Action<IServiceCollection> registerDependenciesAction, string bindUrl)
        {
            return new WebHostBuilder()
#if DEBUG
                .UseContentRoot(Path.GetFullPath(Path.Combine(Directory.GetCurrentDirectory(), @"..\..\..\..\", "WebfrontCore")))
#else
                .UseContentRoot(SharedLibraryCore.Utilities.OperatingDirectory)
#endif
                .UseUrls(bindUrl)
                .UseKestrel()
                .ConfigureServices(registerDependenciesAction)
                .UseStartup<Startup>()
                .Build();
        }
    }
}