SHA=$(git rev-parse HEAD)
 BUILD_DATE=$(date -u +%Y-%m-%dT%H:%M:%SZ)
 VERSION=$(git describe --tags --abbrev=0)

 echo "building container version ${VERSION#v}"

 docker build \
        -t discostu:${VERSION#v} \
        --build-arg VERSION=${VERSION#v} \
        --build-arg SHA=$SHA \
        --build-arg BUILD_DATE=$BUILD_DATE \
        --pull \
        --no-cache .