Change dockerfile base image (python3.12-slim instead of alpine) => fatest and lightest !

[laurentlemercier]

Description

Using alpine image for python application is not the better way, see : https://pythonspeed.com/articles/alpine-docker-python/ for details

Fixes # (issue)

Type of change

Please delete options that are not relevant.

• [ ] Bug fix (non-breaking change which fixes an issue)
• [ X] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)
• [ ] This change requires a documentation update

How Has This Been Tested?

Please describe the tests that you ran to verify your changes. Provide instructions so we can reproduce. Please also list any relevant details for your test configuration

• [ X] Build done on raspberry pi bullseye, docker 26.1.2, build 211e74b

Checklist:

• [ X] My code follows the style guidelines of this project
• [ X] I have performed a self-review of my own code
• [ X] I have commented my code, particularly in hard-to-understand areas
• [ ] I have made corresponding changes to the documentation
• [ ] My changes generate no new warnings
• [ ] Any dependent changes have been merged and published in downstream modules
• [ ] I have added tests that prove my fix is effective or that my feature works (Optional)
• [ X] New and existing unit tests pass locally with my changes (Optional)

Images are fatest to create, and lightest (aapatre/udemy : alpine image, apaatre/udemyslim : python image) :

root@rasp-v4:/opt/udemy# docker image ls
REPOSITORY                TAG                 IMAGE ID       CREATED          SIZE
aapatre/udemyslim         latest              a5734deec135   30 minutes ago   222MB
aapatre/udemy             latest              ae0ec31408bc   21 hours ago     334MB