Understanding ARG and ENV

Let's make sure you understand the difference between the ENV and ARG Dockerfile instructions before we start using them in our Dockerfiles. Select all the correct statements below.

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Variables set in a Dockerfile using the ARG instruction are not accessible after the image is built. This means it is safe to use ARG to store secrets in a Dockerfile.

Variables set using ENV can be used in containers starting from your image, making it a good way to set configuration using a runtime.

It is possible to override variables set with ARG during the build, allowing us to configure images at build$-$time.

Every user starting a container from our image can select a different value for any ENV variables we set in our image.