- Implemented a new `pullImage` method in `ContainerManager` to pull Docker images with validation and error handling.
- Added a corresponding URL route for the `pullImage` view.
- Updated the `views.py` to handle user permissions and session management for the new feature.
- Improved error handling across the codebase by replacing `BaseException` with `Exception`.
- Enhanced rate limiting logic to support JSON format for tracking timestamps.
- Updated UI styles in `manageImages.html` for consistency in gradient backgrounds.