PageTemplate, Service and default route

ServiceStack Routing
2

See the FallbackRoute in the new .NET Core 2.0 SPA Templates.

[FallbackRoute("/{PathInfo*}")]
public class FallbackForClientRoutes
{
    public string PathInfo { get; set; }
}

public class MyServices : Service
{
    //Return index.html for unmatched requests so routing is handled on client
    public object Any(FallbackForClientRoutes request) => 
        new PageResult(Request.GetPage("/"));
}

Also your index.html Template can call Services, other filters, etc.