Fix local docker setup to add support for yarn v3

[sra405]

Yarn v3 needs:

• activating inside Dockerfile
• volumes need mounting in docker-compose

Notes

• yarnrc.yml could be different between environments (i.e. local machine and container) so ignoring the file in the repo and generating one on build in docker

[github-actions[bot]]

• Github Run 7639641084
• Test coverage: 85%