These days everything is either moving or already running in containers when it comes to software infrastructure. The very first container of Symflower was not for our product, some service or our website, it was our continuous integration (CI). Starting off with an almost tiny 100MB, we noticed that our baby Docker container image has grown to a full-size monster with a whopping 6.2GB. Here is a step-by-step guide on how you can reduce the size of your container images and how we slimmed down our oversized monster image.