Update all templates to match latest "yo aspnet" output

templates/WebApplicationBasic/Startup.cs

@@ -1,11 +1,10 @@
 using System;
 using System.Collections.Generic;
-using System.IO;
 using System.Linq;
 using System.Threading.Tasks;
 using Microsoft.AspNetCore.Builder;
 using Microsoft.AspNetCore.Hosting;
-using Microsoft.AspNetCore.Http;
+using Microsoft.Extensions.Configuration;
 using Microsoft.Extensions.DependencyInjection;
 using Microsoft.Extensions.Logging;
 
@@ -13,19 +12,42 @@ namespace WebApplicationBasic
 {
     public class Startup
     {
+        public Startup(IHostingEnvironment env)
+        {
+            var builder = new ConfigurationBuilder()
+                .SetBasePath(env.ContentRootPath)
+                .AddJsonFile("appsettings.json", optional: true, reloadOnChange: true)
+                .AddJsonFile($"appsettings.{env.EnvironmentName}.json", optional: true)
+                .AddEnvironmentVariables();
+            Configuration = builder.Build();
+        }
+
+        public IConfigurationRoot Configuration { get; }
+
         // This method gets called by the runtime. Use this method to add services to the container.
         public void ConfigureServices(IServiceCollection services)
         {
+            // Add framework services.
             services.AddMvc();
         }
 
         // This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
-        public void Configure(IApplicationBuilder app, ILoggerFactory loggerFactory, IHostingEnvironment env)
+        public void Configure(IApplicationBuilder app, IHostingEnvironment env, ILoggerFactory loggerFactory)
         {
-            app.UseDeveloperExceptionPage();
+            loggerFactory.AddConsole(Configuration.GetSection("Logging"));
+            loggerFactory.AddDebug();
+
+            if (env.IsDevelopment())
+            {
+                app.UseDeveloperExceptionPage();
+            }
+            else
+            {
+                app.UseExceptionHandler("/Home/Error");
+            }
 
             app.UseStaticFiles();
-            loggerFactory.AddConsole();
+
             app.UseMvc(routes =>
             {
                 routes.MapRoute(
@@ -33,17 +55,5 @@ namespace WebApplicationBasic
                     template: "{controller=Home}/{action=Index}/{id?}");
             });
         }
-
-        public static void Main(string[] args)
-        {
-            var host = new WebHostBuilder()
-                .UseContentRoot(Directory.GetCurrentDirectory())
-                .UseIISIntegration()
-                .UseKestrel()
-                .UseStartup<Startup>()
-                .Build();
-
-            host.Run();
-        }
     }
 }