- Closes#1252 (part of #913).
- Commands that accept `--platform` currently require it
to be passed explicitly every time. Users working
consistently with a non-native platform (e.g. `linux/amd64`
on Apple Silicon) have no way to set a default, unlike
Docker's `DOCKER_DEFAULT_PLATFORM`.
- This adds support for the `CONTAINER_DEFAULT_PLATFORM`
environment variable as a fallback when `--platform` is not
explicitly provided.
Willjianger9
57d89c25aa