[FIX] Prettier inside the devcontainer doesn't work

[AlexVCaron]

Bug category

• Critical (some functionalities is not working at all)
• Major (something is not working as expected)
• Minor (something but could be improved)
• Trivial (documentation needs correcting and other non-functional issues)

Describe the bug

Prettier is not running inside of the container. In fact, the whole settings section in the devcontainer.json file wasn't applied. This fixes it all.

Steps to reproduce the bug

A. On the main branch

1. Delete the node_modules folder in the workspace if present.
2. Rebuild the container
3. Open any .nf file, the icon for prettier in the lower right corner should be red, indicating prettier is bugged
   B. On this PR
4. Rebuild the container
5. Open any .nf file, the icon for prettier in the lower right corner should be gray, with two check marks