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Description
Some of the containers, especially those for C++, are much bigger than needed. This is probably due to all the files related to the installation of external libraries and dependencies which remain in the container after being installed (they could be deleted).
Finally, we should try to synthesize the number of Docker layers we are using in some of the containers. The less layers the better. Especially when they are related to the installation and compilation of libraries. We should try to handle them all together in one single step.