### What is it? --- Docker uses *containers* which are isolated from one another and come bundled withtheir own software, libraries, and configuration files. while still communicating witheachother through well-defined channels. An important thing to remember here is that since all the containers share the services of a single operating system kernel, **they use fewer resources than a virtual machine**. [DockerHub](https://hub.docker.com/) exists as a collection of images to quickly install on your machine. Uses: - install gitea with Docker