As stated in the API docs
https://docs.docker.com/engine/api/v1.39/#operation/ImageList
an image should contain something like "Containers": 2 but for me, all images returned by the api have "Containers": -1 eventhough there are containers running that use the image
(checked with docker ps -a)
I'm running Docker Engine 18.09.2 with API version 1.39
I tested the image listing with the node package dockerode and with the curl commands
sudo curl --unix-socket /var/run/docker.sock -H "Content-Type: application/json" http:/docker/images/json
and
sudo curl --unix-socket /var/run/docker.sock -H "Content-Type: application/json" http:/v1.39/images/json
