🚀 Dockerize operator to private container repository hub

[sydrawat01]

Currently, we are storing the operator docker image in a public dockerhub repository.

• Use quay.io to store the k8s-operator docker image.
• We need pull secrets so that the kubebuilder manager can pull this private image when using make deploy.

Build and push works after we login using quay secrets:

make docker-build docker-push IMG=quay.io/pwncorp/k8s_operator NS=webapp

But when using make deploy, the pod create by kubebuilder fails to pull the secret container image from quay:

make deploy IMG=quay.io/pwncorp/k8s_operator NS=webapp

[sydrawat01]

As a workaround for now, we have made the k8s_operator docker image public so that we can deploy the operator on the private GKE cluster.