Monitoring Docker Container status

[accforgithubtest]

Assume a scenario where the docker containers are running behind something like containernursery / sablier, which will start / stop containers based on whether there is traffic or not, primarily useful in self-hosted situations where not all containers need to be running all the time.

What is the best practice for monitoring the up / down (start / stop) status of each container ?

Currently I am thinking about setting up a tcp based check for each container based on the export port. But wondering if there is a better suggestion for monitoring the up/down status for containers without having to write a config file with each container listed with the corresponding ports.