The `IMAGE_NAME` field is exported to the `journald` logging driver, but wasn't documented previously.
Since this field is likely to be relevant to consumers, this adds documentation for it.
* Make the specification of max-buffer-size discoverable.
It's not obvious what type of strings are accepted by `max-buffer-size` nor is it obvious what e.g. `4m` means. Four _minutes_? (to me, it looks like something accepted by [ParseDuration](https://pkg.go.dev/time#ParseDuration).
Instead we should direct users to the relevant documentation to explain clearly what's allowed and what the units are.
* Update configure.md
Move content files related to Docker Engine to the /engine content
subdirectory, and update links
Signed-off-by: David Karlsson <35727626+dvdksn@users.noreply.github.com>
David Karlsson