Trivy deployment should support private Container Registries

[v1r7u]

Trivy scanner could scan images from private registries. To achieve that, it uses credentials from scanner configuration file.

At the moment of writing deployment scripts do not provide a way to add Container Registry credentials to this config file.

[savas-guven]

I set this initially to Pri-3, but need to understand the marketplace and likelihood of private registries being in demand.

[v1r7u]

I think it's next to impossible to find a k8s cluster without containers from a private registry. Once you build your application, it should be pushed to a location, which is accessible from the k8s cluster, but not visible to untrusted users - a private container-registry