Yes, that's by design. The YAML file provided in my previous response is a basic example of a Kubernetes deployment. It only includes the essential fields needed to define a deployment, such as the API version, kind, metadata, and spec. The user is expected to fill in the necessary details like the deployment name, replica count, selector, container image, and port according to their specific use case.

The labels field in metadata is optional but useful for grouping and selecting objects using the Kubernetes labels feature. The labels can be used to filter objects in the Kubernetes API, apply selectors to services, and for deployment strategies such as canary and blue-green deployments.

In general, Kubernetes YAML files are meant to be customizable and extensible, allowing users to configure their deployments according to their needs.
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