Avoid ending up with double quoted variables in docker. #545

Related to the buggy way docker handles env-files
see docker/cli#3630 (comment)

When you quote variables in your .env (which IHMO is a best practice):

FOO=BAR
FOO1='BAR1'
FOO2="BAR2"

and then you run docker via docker run --env-file .env
you end up with literal quoted variables inside docker:

FOO=BAR
FOO1='BAR1'
FOO2="BAR2"

This is incorrect, and should be fixed in docker.

and in python via python-dotenv, they become double quoted variables

>>> os.getenv("FOO")
'BAR'

>>> os.getenv("FOO1")
"'BAR1'"

>>> os.getenv("FOO2")
'"BAR2"'

As a work-around for the root-cause, could be avoid ending up with double-quoted variables in python?