chore: Update officers

- Refactored landing page templates for better structure and maintainability.
- Moved gallery and navbar into header includes.
- Removed dependency on django-admin-sortable2:
  - Uninstalled package and removed from requirements.txt.
  - Removed from INSTALLED_APPS and admin usage.
- Updated Dockerfile to use latest Python 3.8 and Node.js 22.x.
- Improved Docker build reliability by updating apt install steps.

Enhanced the "Why Python?" section for better clarity and readability.
Updated the messaging to more effectively communicate the impact of
Python and the community's mission. No structural changes made to the
template.

Refactor/landing page

Refactored the landing page view to provide board members as a static list
instead of querying the Volunteer model. Also renamed 'commitees' to
'committees' for consistency and updated the template context accordingly.
This improves maintainability and fixes template variable mismatches.

Refactor: Update board and committee context

Updated the our_team.html template to use the correct 'committees'
variable instead of the misspelled 'commitees'. This ensures committee
data is displayed properly and aligns with the updated view context.

Fix: Correct template variable for committees