Fixes: 1) Correct `image_url` return logic in models; 2) Fix indentation in the `save` method of `payments` model; 3) Update a minor comment typo in `serializers.py`.
Extra: 1) Minor cleanup of unused imports in `initialize` command.
Fixes: 1) Update Console styling in 'initialize' command to remove non-standard style notice; 2) Simplify STATIC_URL and MEDIA_URL definitions in settings for uniformity.
Extra: 1) Minor cleanup in static and media path handling; 2) Add new location block in nginx for static files access.
