clarification / help on docker -v parameter

[johndpope]

Hi,

I noticed you had some historical contribution to toshi code base some time back.
I'm actually attempting to run the old coin base code for toshi - and noticed you are using a -v switch in this repo to use host disk- is that correct?
https://github.com/johndpope/https-github.com-coinbase-toshi

I looked around for similar switch with docker-compose - but it said use volume
did you ever use it? I'm attempting sync the production blockchain and am a tiny bit exasperated because keep running out of disk space and having to start all over. been at it for over a week now.

I have at the moment I've given up trying to run redis / postgres in docker and used local host instead.
https://github.com/johndpope/https-github.com-coinbase-toshi/tree/useLocalhostConfigurationForPostgres

in general - do you know if is it actually possible to have a docker container save the data to local host instead of inside container?