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security

How to find from which image our image comes from

As an example, lets us look at a Wordpress container

The Dockerfile begins with FROM php:5.6-apache

so we go to the Dockerfile abovementioned https://github.com/docker-library/php/blob/master/5.6/apache/Dockerfile

and we find FROM debian:jessie So this means that we a security patch appears for Debian jessie, we need to build again our image.

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