make database available outside of the container

[Juesto]

this would have the benefit of keeping the database data when running ./lila-docker down and bringing it back up due to the need of changing optional components and such

[fitztrev]

Thanks, I think we'll make this opt-in. I prefer the behavior of the database getting reset after running ./lila-docker down but I can see cases where it might be beneficial or if people have a different preference. Could you add it to the docs/README instead? Also, you can add the database folder to gitignore so that's already set when people use it.

[Juesto]

sure! issuing the docker cp command will automatically create the volume for people so maybe be clear with that, no promises but i'll get around putting it into the readme