Explain why you would use both `ARG` and `ENV` for the same variable in a `Dockerfile`.

Question

Why would you use both `ARG` and `ENV` for the same variable in a `Dockerfile`?

Accepted Answer

To pass a value during construction with `ARG` and make it persistent at runtime with `ENV`.

Answer

Because `ARG` is obsolete and must be doubled with `ENV`.

Answer

To define different environment variables for build and run.

Answer

No reason, it's bad practice.

Question from the Docker test