update docs on setup integration test data
This PR adds some easy-to-follow instructions on how to setup integration test data for beginner developers. Purely documentation update, no code change.
During the maintenance period on Monday, 14 Oct 2024, all new projects will no longer create a container registry as part of the project area. Already existing projects will be unaffected at this time. Instead, users should utilize the official ORNL container registries at camden.ornl.gov (internal/moderate) and savannah.ornl.gov (external/low). Please see ORNL Today article for more info.
This PR adds some easy-to-follow instructions on how to setup integration test data for beginner developers. Purely documentation update, no code change.