nwo postgres container: ability to setup checkpoint_timeout

[adecaro]

This is to avoid connection disruption during a checkpoint for long running sessions.

[mbrandenburger]

Thanks @adecaro for creating this task.

I am wondering ...

• This is the checkpoint_timeout relevant for our integration tests using NWO? In particular, for tests that run less than 60min? What is the default configuration of the container?
• What would be the desired way to configure the postgres container? Could we just mount a postgresql.conf into the container as described in https://hub.docker.com/_/postgres#database-configuration?
• Does our postgres connector require additional timeout adjustments based on the postgres configuration?

Can you elaborate a bit on the details?