potiuk opened a new pull request #4543: [AIRFLOW-3718] Multi-layered version of the docker image URL: https://github.com/apache/airflow/pull/4543 ### Jira - [x] My PR addresses the following [Airflow Jira](https://issues.apache.org/jira/browse/AIRFLOW/) issues and references them in the PR title. For example, "\[AIRFLOW-XXX\] My Airflow PR" - https://issues.apache.org/jira/browse/AIRFLOW-3718 ### Description - [x] Here are some details about my PR, including screenshots of any UI changes: Current official Airflow image is rebuilt from the scratch every time new commit is done to the repo. It is a "mono-layered" one and does not use Docker's multi-layer architecture. This means that builds take longer and that users downloading the image regularly will always download full image. With multi-layered approach and caching enabled in Docker Hub we can optimise it to download only the layers that changed. ### Tests - [x] No tests for the image so far. ### Commits - [x] My commits all reference Jira issues in their subject lines, and I have squashed multiple commits if they address the same issue. In addition, my commits follow the guidelines from "[How to write a good git commit message](http://chris.beams.io/posts/git-commit/)": 1. Subject is separated from body by a blank line 1. Subject is limited to 50 characters (not including Jira issue reference) 1. Subject does not end with a period 1. Subject uses the imperative mood ("add", not "adding") 1. Body wraps at 72 characters 1. Body explains "what" and "why", not "how" ### Documentation - [x] No docs ### Code Quality - [x] Passes `flake8`
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