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The following example is from TechWorld with Nana GitLab. BTW, Nana’s youtube channel is highly recommended. Below is her docker’s tutorial:
Base your images on smaller size images. You can use distribution such as the alpine Linux or Google’s distroless.
One last thing before wrapping this guide, I would like to recommend an open-source utility named Dive. Among its many features, you can explore each layer's content, file sizes, and more. Basically, It helps you analyze docker images. Eventually, providing enough info to think of ways to reduce image sizes.
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- Dive – A tool for exploring each layer in a Docker image