docker_push.sh to ${NIGHTLY_TAG}-$(date +%Y-%m-%d)
.gitlab-ci.yml: docker_push.sh to {NIGHTLY_TAG}-(date +%Y-%m-%d) {FEATURE_EXPORT_TAG}-(date +%Y-%m-%d)
.gitlab-ci.yml: docker_push.sh to {NIGHTLY_TAG}-(date +%Y-%m-%d) {FEATURE_EXPORT_TAG}-(date +%Y-%m-%d)