[0.2] - UI update, backend improvements

Reworked the UI and business logic to reduce bugs from the first draft version and ensured more consistent theming across the user dashboard.

Added

• Resource quotas introduced to avoid system abuse
• Support for bootable volumes

Changed

• Updated the dashboard UI for better user experience.
• Improved page load times

Fixed

• Fixed issue during instance creation which was caused due to celery redis corruption over time