chore: Update Dockerfile to Ubuntu 20.04 + Crash Resolution

[gs-olive]

Description

• Resolve issue with cuda file deletion command causing build crash
• Update installations to use Ubuntu 20.04

Type of change

• Dockerfile Update

Checklist:

• [ x ] My code follows the style guidelines of this project (You can use the linters)
• [ x ] I have performed a self-review of my own code
• [ x ] I have commented my code, particularly in hard-to-understand areas and hacks
• [ x ] I have made corresponding changes to the documentation
• [ x ] I have added tests to verify my fix or my feature
• [ x ] New and existing unit tests pass locally with my changes
• [ x ] I have added the relevant labels to my PR in so that relevant reviewers are notified

[peri044]

LGTM