Testspace: Note: Use a custom pre‐populated image data

Use a custom pre-populated image data

A .testenv.local file at root folder is required to pull private images from Docker:

data_docker_registry=docker.io
data_docker_username=my_user
data_docker_password="my_password"
data_docker_email=my_email@domain.com

Change image of pre-populated data from deployments/k8s-yaml/data-postgres-prepopulated.yaml file