This has been pulled and edited from askmeegs@ https://github.com/askmeegs/yaml-region-tag-generator!
docker build -t gcr.io/megandemo/yamltag:latest .
docker run -e ID_RSA=$ssh_key -e KNOWN_HOSTS=$known_hosts -e PRODUCT="istio" \
-e GITHUB_REPOSITORY="askmeegs/istio-samples" -e GITHUB_REF="saturday" \
gcr.io/megandemo/yamltag:latest