Startup.cs

using Microsoft.AspNet.Builder;
using Microsoft.AspNet.Cors.Infrastructure;
using Microsoft.AspNet.Hosting;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Logging;

namespace org.cdshooks.example
{
    public class Startup
    {
        public Startup(IHostingEnvironment env)
        {
            // Set up configuration sources.
            var builder = new ConfigurationBuilder()
                .AddJsonFile("appsettings.json")
                .AddEnvironmentVariables();
            Configuration = builder.Build();
        }

        public IConfigurationRoot Configuration { get; set; }

        // This method gets called by the runtime. Use this method to add services to the container.
        public void ConfigureServices(IServiceCollection services)
        {
            services.AddMvc();
            // Add framework services.
            services.Configure<CorsOptions>(options =>
            {
                options.AddPolicy(
                    "WithCredentialsAnyOrigin",
                    builder =>
                    {
                        builder.AllowCredentials()
                            .AllowAnyOrigin()
                            .AllowAnyHeader()
                            .WithMethods("GET", "POST", "OPTIONS");
                    });
            });
        }

        // This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
        public void Configure(IApplicationBuilder app, IHostingEnvironment env, ILoggerFactory loggerFactory)
        {
            loggerFactory.AddConsole(Configuration.GetSection("Logging"));
            loggerFactory.AddDebug();

            app.UseIISPlatformHandler();

            app.UseStaticFiles();

            app.UseMvc();
        }

        // Entry point for the application.
        public static void Main(string[] args) => Microsoft.AspNet.Hosting.WebApplication.Run<Startup>(args);
    }
}