if [[ ! -z "${DOCKER_REGISTRY_MIRRORS+x}" ]]; then
sed -i -e 's/DOCKER_REGISTRY_MIRRORS=.*/DOCKER_REGISTRY_MIRRORS="'"${DOCKER_REGISTRY_MIRRORS}"'"/' ${ICNDIR}/user_config.sh
if [[ ! -z "${DOCKER_REGISTRY_MIRRORS+x}" ]]; then
sed -i -e 's/DOCKER_REGISTRY_MIRRORS=.*/DOCKER_REGISTRY_MIRRORS="'"${DOCKER_REGISTRY_MIRRORS}"'"/' ${ICNDIR}/user_config.sh