See ‘docker container commit’ [0]
> Create a new image from a [running] container's changes
You might then be able to run ‘docker image history’ [1] to get the changes, which you might be able to write into your own Dockerfile [2]
but I’ve never tested this workflow because the best practice is just to write a Dockerfile first
The tool (docker) was designed in a specific way, learn how to use the tool’s workflow instead of wishing for a different workflow and you’ll have a much easier time.
[0]: https://docs.docker.com/reference/cli/docker/container/commi...
[1]: https://docs.docker.com/reference/cli/docker/image/history/
[2]: can’t remember how docker tracks internal container file system changes and whether the history command will pick them up
Edit — see sibling comment https://news.ycombinator.com/item?id=41371867 — basically… learn to build a dockerfile (they’re very simple and easy once you know how).
