One method of creating container images has been covered so far: create a container, modify it to meet the requirements of the application to run in it, and then commit the changes to an image. This option, although straightforward, is only suitable for using or testing very specific changes. It does not follow best software practices, like maintainability, automation of building, and repeatability.
Dockerfiles are another option for creating container images, addressing these limitations. Dockerfiles are easy to share, version control, reuse, and extend.
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