Update to ASP.NET Core 8 Preview 3

Author: dodyg

projects/.net8/README.md

@@ -1,6 +1,6 @@
 # ASP.NET 8.0 Preview 3 (7)
 
-These samples require [.NET 8.0 Preview 3](https://github.com/dotnet/aspnetcore/blob/main/docs/DailyBuilds.md). You will have to install the daily build since Preview 3 is not officially released yet. 
+These samples require [.NET 8.0 Preview 3](https://dotnet.microsoft.com/en-us/download/dotnet/8.0). 
 
 
 * [QuickGrid One](QuickGridOne)

projects/.net8/build.bat

@@ -0,0 +1,7 @@
+dotnet build QuickGridOne
+dotnet build RazorComponentFive
+dotnet build RazorComponentFour
+dotnet build RazorComponentOne
+dotnet build RazorComponentSix
+dotnet build RazorComponentThree
+dotnet build RazorComponentTwo

projects/.net8/nuget.config

@@ -1,8 +1,10 @@
 <?xml version="1.0" encoding="utf-8"?>
 <configuration>
     <packageSources>
+        <!--
         <clear />
         <add key="aspnetcore" value="https://pkgs.dev.azure.com/dnceng/public/_packaging/dotnet8/nuget/v3/index.json" />
         <add key="NuGet.org" value="https://api.nuget.org/v3/index.json" />
+        -->
     </packageSources>
 </configuration>