Docker and CI/CD · Middle · Question 73 of 75

What does `docker history my-app` help you find?

1Which containers were started from the image and when
✓Correct answer: Which instructions created which layers and how big each is
3Which users pulled the image from the registry

Explanation

It lists layers with their size and the instruction that produced them, a quick way to spot a huge COPY or a forgotten cache folder.

Further reading

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