Fixed: 3.1 to .NET 6 upgrade issue

[keane1030]

In CreateHostBuilder, I had to add this to get the _content files

            // 👇 Add this "ConfigureAppConfiguration" method calling.
            webBuilder.ConfigureAppConfiguration((ctx, cb) =>
            {
                StaticWebAssetsLoader.UseStaticWebAssets(
                    ctx.HostingEnvironment,
                    ctx.Configuration);
            });

Inside
Host.CreateDefaultBuilder(args)
.ConfigureWebHostDefaults(webBuilder =>
{

            // 👇 Add this "ConfigureAppConfiguration" method calling.
            webBuilder.ConfigureAppConfiguration((ctx, cb) =>
            {
                StaticWebAssetsLoader.UseStaticWebAssets(
                    ctx.HostingEnvironment,
                    ctx.Configuration);
            });
        }

I have a special class for the configuration so it's not shown here. Hopefully this saves people times as it took me a while to find this.