How to unset “ENV” in dockerfile?

Question

For some certain reasons, I have to set \"http_proxy\" and \"https_proxy\" ENV in my dockerfile. I would like to now unset them because there are also some buil

Answer 1

According to docker docs you need to use shell command instead:

FROM alpine
RUN export ADMIN_USER="mark" \
&& echo $ADMIN_USER > ./mark \
&& unset ADMIN_USER
CMD sh

See https://docs.docker.com/develop/develop-images/dockerfile_best-practices/#env for more details.