Merge pull request #14570 from vdemeester/13365-ps-image-filter

Add docker ps ancestor filter for image
Upstream-commit: b1cb1b1df493b3e0b739b9f374b6c82e306dede8
Component: engine

components/engine/docs/reference/commandline/ps.md

@@ -50,6 +50,7 @@ The currently supported filters are:
 * name (container's name)
 * exited (int - the code of exited containers. Only useful with `--all`)
 * status (created|restarting|running|paused|exited)
+* ancestor (`<image-name>[:<tag>]`,  `<image id>` or `<image@digest>`) - filters containers that were created from the given image or a descendant.
 
 
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