Fix docker-file path for push step.
Fix docker-file path for push step.

dotnet-architecture/eShopOnContainers,dotnet-architecture/eShopOnContainers,albertodall/eShopOnContainers,albertodall/eShopOnContainers,dotnet-architecture/eShopOnContainers,albertodall/eShopOnContainers,skynode/eShopOnContainers,dotnet-architecture/eShopOnContainers,skynode/eShopOnContainers,skynode/eShopOnContainers,albertodall/eShopOnContainers,dotnet-architecture/eShopOnContainers,skynode/eShopOnContainers,albertodall/eShopOnContainers,skynode/eShopOnContainers