September 2025
Beginner to intermediate
488 pages
12h 55m
English
Content preview from Learn Docker in a Month of Lunches, Second Edition
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3 Building your own Docker images
You ran some containers in the preceding chapter and used Docker to manage them. Containers provide a consistent experience across applications, no matter what technology stack the app uses. Until now, you’ve used Docker images that I’ve built and shared; now you’ll see how to build your own images. This is where you’ll learn about the Dockerfile syntax and some of the key patterns you’ll always use when containerizing your own apps.
3.1 Using a container image from Docker Hub
We’ll start with the finished version of the image you’ll build in this chapter so that you can see how it’s been designed to work well with Docker. The Try It Now exercises all use a simple application called web-ping, which checks ...
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