pull from docker.io

$ docker pull wyflow/mapfs:2.3

$ docker image ls

remove

# check if there are running/stopped containers pointing to this image
$ docker ps -a

# stop the running containers pointing to this image
$ docker stop <Container ID>
...

# delete stopped containers pointing to this image
$ docker rm <Container ID>
...

# remember wyflow/mapfs:2.3 "IMAGE ID"
$ docker image ls

$ docker image rm <IMAGE ID>

If there are containers attached with the image, you should stop/delete these containers firstly.