-NEXUS_DOCKER_REPO=$(cat /opt/config/nexus_docker_repo.txt)
-DOCKER_IMAGE_VERSION=$(cat /opt/config/docker_version.txt)
+export NEXUS_DOCKER_REPO=$(cat /opt/config/nexus_docker_repo.txt)
+export MTU=$(/sbin/ifconfig | grep MTU | sed 's/.*MTU://' | sed 's/ .*//' | sort -n | head -1)
+#DOCKER_IMAGE_VERSION=$(cat /opt/config/docker_version.txt) --> not needed at the moment