The MAINTAINER instruction sets the Author field of the generated images. MAINTAINER is deprecated since Docker 1.13.0.

In case you need similar functionality consider using a LABEL.

The LABEL instruction is a much more flexible version of MAINTAINER, as it enables setting any metadata you require, and can be viewed easily, for example with docker inspect.

Bad Practice

FROM debian:buster
MAINTAINER John Doe <me@johndoe.xyx>

Recommended

FROM debian:buster
LABEL org.opencontainers.image.authors="me@johndoe.xyx"

This will then be visible from docker inspect with the other labels.

blurt / blurt

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