Web Reference: Download and install Docker Desktop. Examine the project. Explore the contents of getting-started-todo-app/app/. You'll notice that a Dockerfile already exists. It is a simple text file that you can open in any text or code editor. Delete the existing Dockerfile. Before we construct our Dockerfile, you need to understand what makes up the file. This will be a text file, named Dockerfile, that includes specific keywords that dictate how to build a specific image. The specific keywords you can use in a file are: 1. ADDcopies the files from a source on the host into the container’s filesystem at the set destin... Apr 26, 2025 · How to Write a Dockerfile (Step-by-Step for Beginners) If you’ve been following along, you already know what Docker is and how it helps you package your app into neat little containers.
YouTube Excerpt: We spin up all types of containers on my channel in my tutorials but we have yet to build our own custom Docker container image.
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