Netcore3.0 (#323)

* Updates based on documentation

* Getting the build passing

* Getting app functioning

* A few cleanups to confirm it's working as expected

* Fixing functional tests

* Updating dockerfile for 3.0

* Functional Tests now run sequentially

* Updating to latest version of moq

* Adding migration for post 3.0 upgrades

* Removing commented out lines

* Moving address and catalogitemordered configuration in to classes that own them

* Minor cleanups

tests/FunctionalTests/Web/Pages/BasketPageCheckout.cs

@@ -11,6 +11,7 @@ using Xunit;
 
 namespace Microsoft.eShopWeb.FunctionalTests.WebRazorPages
 {
+    [Collection("Sequential")]
     public class BasketPageCheckout : IClassFixture<CustomWebApplicationFactory<Startup>>
     {
         public BasketPageCheckout(CustomWebApplicationFactory<Startup> factory)
@@ -28,7 +29,7 @@ namespace Microsoft.eShopWeb.FunctionalTests.WebRazorPages
             string regexpression = @"name=""__RequestVerificationToken"" type=""hidden"" value=""([-A-Za-z0-9+=/\\_]+?)""";
             var regex = new Regex(regexpression);
             var match = regex.Match(input);
-            return match.Groups.LastOrDefault().Value;
+            return match.Groups.Values.LastOrDefault().Value;
         }
 
         [Fact]