Feature/implement docker

[PaulS-Argo]

• Introduced new standardised, containerised environment (Beast Lab)
• Generates a docker file and a docker compose file.
• Runs docker commands by default with cli prompts in case the user wants to use something else (i.e. podman/buildah)
• Allows the user to modify the dockerfiles if they so wish.
• Commands added to build/open/close the lab.
• Documentation updated
• New unit tests written for feature.

[chris-argo]

I haven't run it up to test fully, but LGTM from a code inspection PoV, and I assume it works for you.