Pass GITHUB_REF so release can properly tag
Pass the variable to docker so it's available to the release script.
FROM quay.io/submariner/shipyard-dapper-base:devel
-ENV DAPPER_ENV="REPO TAG QUAY_USERNAME QUAY_PASSWORD GITHUB_SHA CLUSTERS_ARGS DEPLOY_ARGS IMAGES_ARGS RELEASE_ARGS" \
+ENV DAPPER_ENV="REPO TAG QUAY_USERNAME QUAY_PASSWORD GITHUB_REF CLUSTERS_ARGS DEPLOY_ARGS IMAGES_ARGS RELEASE_ARGS" \
DAPPER_SOURCE=/go/src/github.com/submariner-io/submariner DAPPER_DOCKER_SOCKET=true
ENV DAPPER_OUTPUT=${DAPPER_SOURCE}/output
