I do no think "Don’t create large images" is a good one. I prefer to have a single image that I use to run multiple containers with different services that form

I do no think "Don’t create large images" is a good one. I prefer to have a single image that I use to run multiple containers with different services that forms a pod. This greatly simplifies distribution as I need just single image file. It also greatly simplifies updates. But with such image it is useful to add few tools so docker exec -ti container /bin/bash creates a shell that one can use for debugging or verification.