fix(docker): correct run.sh path in simple Dockerfile

[crufter]

I think the current version of the Dockerfile assumes a docker context of project root, but I don't see why that should be the case, since the line

RUN pip install llama-cpp-python --verbose;

clearly indicates that the project source code is not needed?
Seems like a waste of resources to use project root as the context?

This is also inline with the other Dockerfiles such as Open Llama one.