Use 7z built-in function to split the dumpped mongodb and delete the original file?

[PeterDaveHello]

CVE-Search-Docker/docker/files/mongodb/data_dump_compress.sh

Lines 8 to 13 in 586d5c4

	7z a -t7z -m0=lzma -mx=9 -mfb=64 -md=32m -ms=on db_dump.7z ./dump
	split -b 50M db_dump.7z "db_dump_part"
	rm -rf ./dump
	rm -rf ./db_dump.7z

7z a -t7z -m0=lzma -mx=9 -mfb=64 -md=32m -ms=on db_dump.7z ./dump

split -b 50M db_dump.7z "db_dump_part"

rm -rf ./dump
rm -rf ./db_dump.7z

I think we can replace the above commands with a single one:

7z -v50m a -t7z -m0=lzma -mx=9 -mfb=64 -md=32m -ms=on db_dump.7z -sdel ./dump

Not sure if you'd like to accept the change and I'd prepare the pull request ;)