Use new .NET9 methods MapStaticAssets and WithStaticAssets in admin portal.

Author: Kevin Campusano

EndPointEcommerce.AdminPortal/Program.cs

@@ -102,7 +102,7 @@ public static void Main(string[] args)
 
         app.UseHttpsRedirection();
 
-        app.UseStaticFiles();
+        app.MapStaticAssets();
 
         app.UseStaticFiles(new StaticFileOptions
         {
@@ -126,7 +126,8 @@ public static void Main(string[] args)
 
         app.UseAuthorization();
 
-        app.MapRazorPages();
+        app.MapRazorPages()
+            .WithStaticAssets();
 
         app.MapHealthChecks("/healthz");