For not having to call 'source ...' in a Dockerfile, if you use the python executable from the virtualenv directly, then it will be as if you've activated that virtualenv.
This works because of the relative path to the pyenv.cfg file.
I wonder if you can, under GDPR, request that all your data is deleted and then create a new account. Not allowing you to create a new account could be argued as a violation of GDPR as it would mean that they kept personally identifiable data about you.
This works because of the relative path to the pyenv.cfg file.