Migrate aspnet-mssql sample to .NET 5 🚀 (#143)

* Updated MVC app to .NET 5

Signed-off-by: GitHub <noreply@github.com>

* Added SQL Server health check

Signed-off-by: GitHub <noreply@github.com>

* Updated README.md files with ASP.NET samples

Signed-off-by: GitHub <noreply@github.com>

aspnet-mssql/app/aspnetapp/Startup.cs

@@ -1,14 +1,11 @@
 using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Threading.Tasks;
 using Microsoft.AspNetCore.Builder;
 using Microsoft.AspNetCore.Hosting;
 using Microsoft.AspNetCore.Http;
-using Microsoft.AspNetCore.HttpsPolicy;
 using Microsoft.AspNetCore.Mvc;
 using Microsoft.Extensions.Configuration;
 using Microsoft.Extensions.DependencyInjection;
+using Microsoft.Extensions.Hosting;
 
 namespace aspnetapp
 {
@@ -32,11 +29,12 @@ namespace aspnetapp
             });
 
 
-            services.AddMvc().SetCompatibilityVersion(CompatibilityVersion.Version_2_1);
+            services.AddMvc().SetCompatibilityVersion(CompatibilityVersion.Version_3_0);
+            services.AddControllers();
         }
 
         // This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
-        public void Configure(IApplicationBuilder app, IHostingEnvironment env)
+        public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
         {
             if (env.IsDevelopment())
             {
@@ -48,16 +46,13 @@ namespace aspnetapp
                 app.UseHsts();
             }
 
-            app.UseHttpsRedirection();
             app.UseStaticFiles();
             app.UseCookiePolicy();
+            app.UseRouting();
 
-            app.UseMvc(routes =>
-            {
-                routes.MapRoute(
-                    name: "default",
-                    template: "{controller=Home}/{action=Index}/{id?}");
-            });
+            app.UseEndpoints(e => e.MapControllerRoute(
+                name: "default",
+                pattern: "{controller=Home}/{action=Index}/{id?}"));
         }
     }
 }