Look on how to retain older images in case latest is broken #67
Description
From #62 , we should investigate if we can have old images laying around in hub.
Unfortunately, all images on docker-hub (see: https://hub.docker.com/r/owasp/modsecurity-crs/tags) have just been overridden and it is not possible to pull an older variant. This should definitely be fixed to allow (automatic) rollbacks in case a newer image is broken.