Hey quick Dockerfile Q. Is there any reason why one might do this:

CMD export SOME_ENV_VAR=some_value

As opposed to just:

ENV SOME_ENV_VAR=some_value

In our Dockerfile we're chaining that

export

with a call to start the actual process, eg:

CMD export SOME_ENV_VAR=some_value && supervisord -c /etc/supervisor/supervisord.conf

But pretty sure that doesn't make any difference to anything. I guess the question is whether there's any difference in how an env variable gets set between

ENV

and calling

export

from the shell.