docs: loki

[jtagcat]

Adjust the downloaded settings as required.

Adjust them.. where?

Also 'You may want to adjust the downloaded settings in /somewhere.' would also remove the need for 'Default settings should work fine for a start.'.

[jtagcat]

            max-size: 20m

is it minutes? If it is MB or Mb, I would replace it with a capitalized M.

[avkonst]

this max-size setting comes from the options for the driver. It is quite standard for the Docker logging option. I will have a look if it accepts MB.