SummaryAs a developer, it’s common to download tool packages that help us create projects, such as a language, a library, a framework, or a mix of all of those.If we add Docker to this combination, we can see the importance of downloading these packages since by default a Docker container has nothing inside it, and it is through an image that we communicate to Docker the packages that we need to download and install to work. Downloading and installation can take a long time, and the problem increases if this has to be repeated a number of times.