My first encounter with docker goes back to early 2015. Docker was experimented with to find out whether it could benefit us. At the time it wasn’t possible to run a container [in the background] and there wasn’t any command to see what was running, debug or ssh into the container.
https://thehftguy.com/2016/11/01/docker-in-production-an-history-of-failure/
https://thehftguy.com/2016/11/01/docker-in-production-an-history-of-failure/