Figure out what the pods directory in a deployment is for

[dboreham]

Test deployment produces this directory structure:

$ tree test-deploy
test-deploy
├── compose
│   └── composefile-test.yml
├── config.env
├── data
│   ├── test-config
│   ├── test-data-auto
│   └── test-data-bind
├── deployment.yml
├── pods
│   └── test
├── spec.yml
└── stack.yml

The pods directory has an empty subdirectory. Why?