Docker http://containers/json endpoint depreciation notification

[mrbobbytables]

This is more of a general informative post following up a conversation in #falco with @mstemm.

Docker has depreciated the http://containers/json endpoint and all future API calls should be prepend the API version. e.g. http://v1.25/containers/json.

It is targeted for removal in the v17.12 release.
For further information, please see the below links:

• https://docs.docker.com/engine/deprecated/#api-calls-without-a-version
• [carry 27830] Deprecate API calls without a version moby/moby#28208

[gnosek]

As far as I could find, the docker client always uses an explicit version number ("v1.18" and "v1.24"). Going back through the code, it seems like it has always been the case.