gcloud auth configure-docker
# example: `docker tag py-qod gcr.io/kub-py-qod/py-qod:latest`
docker tag [SOURCE_IMAGE] [HOSTNAME]/[PROJECT-ID]/[IMAGE]:[TAG]
# example: `docker push gcr.io/kub-py-qod/py-qod:latest`
docker push [HOSTNAME]/[PROJECT-ID]/[IMAGE]:[TAG]