Update makefile/dockerfile

[NoodlesNZ]

Changes:

• Fix broken URLs in Dockerfile
• Bump base image for Dockerfile
• Update to use poetry to manage dependencies
• Use poetry to run commands in Makefile so that the virtual environment is used
• Add entrypoint.sh to remove complexity/overloading in Makefile

The docker image can now be used like this:

docker run --rm -v $(pwd):/work pytm:latest dfd

or

docker run --rm -v $(pwd):/work pytm:latest dfd other_tm.py

This means the docker image can be used without the Makefile which makes it more portable

make can still be used as per normal, but it removes the complexity of trying to use docker as a shell (which didn't seem to work well)

[izar]

Thanks!