With Docker images, you can easily deploy containers without having to worry about maintaining the same overhead required by virtual machines. These containers can be pulled from the Docker Hub with ease, for easy use. Let’s say, for example, you want to pull down the latest Ubuntu image for development purposes. However, before you start development, there are a number of changes you need to make to the image (such as updating, upgrading, and adding the build-essential package to the mix). Now, what if you plan on needing that same customized image for a number of development projects? You could always pull the latest Ubuntu image and then manually run the commands to update, upgrade, and install build-essential.
Or you could make use of Dockerfiles. A Dockerfile is a file used to build a Docker image to your specifics. With a Dockerfile constructed, you could then easily build the same To Read More Click Here
Reference:- This article was published on BestDevOps.com
This is a really practical and clear introduction to Dockerfiles, which are fundamental for building reproducible container images in any DevOps workflow. By explaining the purpose of each instruction and how Dockerfiles automate the process of defining an image’s environment, dependencies, and startup behavior, this post gives readers a solid foundation for writing their own. Understanding how to structure layers, optimize builds, and leverage best practices not only improves container performance but also makes CI/CD pipelines more efficient and reliable. Great resource for beginners and anyone looking to strengthen their containerization skills!
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