BUG: remove deprecated docker login flag
BUG: remove deprecated docker login flag

docker login -e has been removed, see

https://docs.docker.com/engine/deprecated/#-e-and---email-flags-on-docker-login

QIICR/dcmqi,QIICR/dcmqi,QIICR/dcmqi,QIICR/dcmqi,QIICR/dcmqi