Revert "ci: test apt-cacher-ng from within the apt-cacher-ng container"
Revert "ci: test apt-cacher-ng from within the apt-cacher-ng container"

This reverts commit 16028df9a87cb542c8698e6e9304b4c788e553f8.

circleci does not support `exec`.. FUCK IT!

sameersbn/docker-apt-cacher-ng