CentOs 7.4 with docker version 1.12.6, build 85d7426/1.12.6 `./buildDockerImage.sh -v 12.1.0.2 -s -i` results in ```Step 16 : HEALTHCHECK --interval=1m --start-period=5m CMD "$ORACLE_BASE/$CHECK_DB_FILE" >/dev/null || exit 1 Unknown flag: start-period There was an error building the image. ```