changed docker instructions in README to comply with changed installa…

[psvensson]

…tion path in container

Background

Changes

Documentation

Test Plan

PR Quality Checklist

• [ ] My pull request is atomic and focuses on a single change.
• [ ] I have thoroughly tested my changes with multiple different prompts.
• [ ] I have considered potential risks and mitigations for my changes.
• [ ] I have documented my changes clearly and comprehensively.
• [ ] I have not snuck in any "extra" small tweaks changes

[nponeccop]

@psvensson There are conflicts now

[github-actions[bot]]

This pull request has conflicts with the base branch, please resolve those so we can evaluate the pull request.

[ntindle]

Closing due to readme changes. Please reopen if required still