Retrieving container logs

It is a best practice for any good application to generate some logging information that developers and operators alike can use to find out what the application is doing at a given time, and whether there are any problems to help to pinpoint the root cause of the issue.

When running inside a container, the application should preferably output the log items to STDOUT and STDERR and not into a file. If the logging output is directed to STDOUT and STDERR, then Docker can collect this information and keep it ready for consumption by a user or any other external system:

1. Run a trivia container in detach mode:

   $ docker container run --detach \    --name trivia fundamentalsofdocker/trivia:ed2

Let it run for a minute or so so that it has time to generate a few trivia questions.

2. To access the logs of a given container, we can use the docker container logs command. If, for example, we want to retrieve the logs of our trivia...