How to write Docker base image

I read the best practices

Best Practice

If possible, use the current official repository as the source for your image. We recommend the Debian image. This is because it is very well managed and kept to be the smallest in the distribution (currently less than 100 MB).

So let's use the Debian system.

How do you choose

  1. Decide on a base OS. ubuntu, centos, python, etc.
  2. Select a formula with the docker search command. It's safe to use the one with the most STARS.
  3. Search the official image on Dockerhub and you will find a list of Tags, so select from there.
  4. FROM {image name}: {tag name}

Example

FROM python:rc-alpine3.12

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