Added signalr client for MVC
Added signalr hub
Added signalr events when order status changes

drop rudiments from identity api

Remove private setters to make a class truly immutable. Otherwise, properties can be updated outside of constructor. This also makes code cleaner. Same in docs https://github.com/dotnet/docs/pull/4755

Remove explicitly copied dependencies, copy entire solution
into the conainter and depends on the cache to reduce build
time.

Addd temporary solution file which does not contains the
dcproj file to work around the issue that the dotnet cli
cannot handle dcproj.