⬆️(backend) upgrade to Django 4.x (4.0, 4.1, <5)

[jonathanreveille]

Purpose

From Django version 3.2.25 to 4.0 : The project was using Django 3.2.25, it now uses Django 4.0, this involved :

• upgrading postgres image to version 12 (drop support for postgres < 12)
• shift from pytz library to datetime.timezone instead.
• updated the template tags {% ifequal %} in favor of {% if %}.
• USE_L1ON is deprecated in settings if value is True

From Django 4.0 to 4.1 :

• Update project.toml file to pin version to 4.1 of Django.
• Adjust admin view tests

From Django 4.1 to 4.2:

• Update project.toml file to pin version Django <5
• Change staticfile settings constant in configuration file.
• Dropped support for mysql < 8
• Dropped circleci test-back-msql-5

Proposal

• resources :

1. https://docs.djangoproject.com/en/5.0/releases/4.0/
2. https://docs.djangoproject.com/en/5.0/releases/4.1/
3. https://docs.djangoproject.com/en/5.0/releases/4.2/