Simplify samples

samples/frontend-backend/backend/Startup.cs

@@ -36,10 +36,9 @@ namespace Backend
             {
                 endpoints.MapGet("/", async context =>
                 {
-                    var connection = context.Features.Get<IHttpConnectionFeature>();
                     var backendInfo = new BackendInfo()
                     {
-                        IP = connection.LocalIpAddress.ToString(),
+                        IP = context.Connection.LocalIpAddress.ToString(),
                         Hostname = Dns.GetHostName(),
                     };
 

samples/frontend-backend/frontend/Startup.cs

@@ -53,8 +53,7 @@ namespace Frontend
                     var bytes = await httpClient.GetByteArrayAsync("/");
                     var backendInfo = JsonSerializer.Deserialize<BackendInfo>(bytes, options);
 
-                    var connection = context.Features.Get<IHttpConnectionFeature>();
-                    await context.Response.WriteAsync($"Frontend Listening IP: {connection.LocalIpAddress}{Environment.NewLine}");
+                    await context.Response.WriteAsync($"Frontend Listening IP: {context.Connection.LocalIpAddress}{Environment.NewLine}");
                     await context.Response.WriteAsync($"Frontend Hostname: {Dns.GetHostName()}{Environment.NewLine}");
                     await context.Response.WriteAsync($"EnvVar Configuration value: {Configuration["App:Value"]}{Environment.NewLine}");