How do I run dex via docker?

[idc77]

There's a dexidp/dex docker image at https://hub.docker.com/r/dexidp/dex

To spare myself the headache I've decided that, this time I'll use docker to run a service.
But there is no additional info about this image.

How can I find out what parameters or what I have to do to be able to use this image behind a nginx proxy?
Just the docker part is enough.

Let me be more specific.

Just running dex in a docker container,
using the local postgres storage
and some config file in /etc/dex