Every Docker image is defined as a stack of layers, each defining fundamental, stateless changes to the image. The first layer might be the virtual machine’s operating system (a Debian or Ubuntu Docker image), the next the installation of dependencies necessary for your application to run, and all the way up to the source code of your application. The best way to leverage this system is via a Dockerfile.
Best Practices
A Dockerfile is a way to script the building of an image. This script uses a domain-specific language to tell the Docker daemon how to sequentially build a Docker image. ...
