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by alberteinstein 3062 days ago
This adds an un-necessary dependency between services. Team working on service A would need to coordinate with team working on service B to keep same layers. The contract should be to keep the image size as small as possible, and teams can work independently.

Also, python:3.6 doesn't always mean the same layers, since it could be rebuilt with entirely different layers with same tag, unless FROM is locked to a particular layer.