Update to the latest docker images for postgres and rethink databases (and maria)?

[adrianblakey]

The maria 10.5 update is a simple change to the docker compose file - and just works.

Postgres 12 won't start and belly aches about access control and certificates - what needs to be done to make it work?

There are now Rethinkdb community-supported images for 2.4. Seems like they are installed in a different path from the jlhawn image and fail to run - more research needed ...

And instead of using OS volumes could we use docker volume mounts instead of OS bind mounts? It's a bit of code to create a volume, mount it on a temp container and copy files to it ...