Docker generate random names for running containers,
if no --name=myapp flag explicitly set:
➜ ~ docker ps -a --format='{{.Names}}'
recursing_shirley
stupefied_ride
flamboyant_gagarin
Out of general curiosity, I've googled how such generated names are built.
What I've found:
the container name is built of randomly-chosen adjective and a last name of a famous person from a computer science world.
you can import Docker's name generator as a dependency.