docs: add improved default configuration in example files

[nanderstabel]

Description of change

See #122

Update to default example configuration for a smoother Quick Start experience.

Links to any relevant issues

• Update example configuration in example.config.yaml and compose.yaml  #122

How the change has been tested

Tested through going through this new Quick Start guide: https://docs-git-test-quick-start-impierce.vercel.app/unicore/introduction/quick_start

Definition of Done checklist

Add an x to the boxes that are relevant to your changes.

• I have followed the contribution guidelines for this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• I have successfully tested this change in a docker environment