Add .NET cases to workflow lifecycle

tests/e2e/workload-lifecycle/services/dotnet-musl-server/Program.cs

@@ -1,6 +1,50 @@
-var builder = WebApplication.CreateBuilder(args);
-var app = builder.Build();
+using Microsoft.AspNetCore.Builder;
+using Microsoft.AspNetCore.Hosting;
+using Microsoft.AspNetCore.Http;
+using Microsoft.Extensions.Logging;
+using System;
 
-app.MapGet("/", () => "Hello World!");
 
-app.Run("http://0.0.0.0:8080");
+namespace LegacyWebHostTest
+{
+    public class Program
+    {
+        public static void Main(string[] args)
+        {
+            var host = new WebHostBuilder()
+                // Configure Kestrel, etc.
+                .UseKestrel()
+
+                // Logging
+                .ConfigureLogging(logging =>
+                {
+                    logging.ClearProviders();
+                    logging.AddConsole();
+                    // Typically with 2.x hosting, AddConsole()
+                    // sets up the console logger, including logger for WebHost
+                })
+
+                // Minimal pipeline
+                .Configure(app =>
+                {
+                    app.Run(async context =>
+                    {
+                        var logger = context
+                            .RequestServices
+                            .GetService(typeof(ILogger<Program>))
+                            as ILogger<Program>;
+
+                        logger?.LogInformation("Handling request on path {path}", context.Request.Path);
+
+                        await context.Response.WriteAsync("Hello from a legacy webhost on .NET 6\n");
+                    });
+                })
+
+                // Build the host
+                .Build();
+
+            // Run
+            host.Run("http://0.0.0.0:8080");
+        }
+    }
+}

tests/e2e/workload-lifecycle/services/dotnet-musl-server/dotnet-musl-server.csproj

@@ -1,7 +1,8 @@
 <Project Sdk="Microsoft.NET.Sdk.Web">
 
   <PropertyGroup>
-    <TargetFramework>net8.0</TargetFramework>
+    <TargetFramework Condition="'$(USE_DOTNET6)' == 'true'">net6.0</TargetFramework>
+    <TargetFramework Condition="'$(USE_DOTNET6)' != 'true'">net8.0</TargetFramework>
     <RootNamespace>dotnet-musl-server</RootNamespace>
     <ImplicitUsings>enable</ImplicitUsings>
     <Nullable>enable</Nullable>