Documentation: Add `--log-driver none` suggestion to avoid diskspace limit

[homersimpsons]

I was importing a huge 7z file (35GB) streaming it into another process:

> docker run --rm -v .:/data --workdir /data crazymax/7zip 7z e "heavy.7z" -so > /dev/null

But docker was logging everything and quickly (40 minutes) filled my 300GB disk space. To avoid this, I had to add --log-driver none:

> docker run --log-driver none --rm -v .:/data --workdir /data crazymax/7zip 7z e "heavy.7z" -so > /dev/null

Note that changing the 7z's -bb option did not change anything.