Add ability to configure docker containers via equvalient of --cpus flag

[Mondonno]

At the moment Pulumi does not support to change the allowed amount of CPUs to be allocated for the container, it is only possible to set CPU Shares and CPU Sets.

See: https://docs.docker.com/engine/containers/resource_constraints/#cpu

It is much needed to have the ability to set CPUs since without it is not possible to constrain the container usage of CPU.

[rquitales]

Thanks for this suggestion. Since this is a bridged Terraform provider, feature requests should be made against https://github.com/kreuzwerker/terraform-provider-docker. Any updates to the upstream provider will be picked up by our provider.