The basis for this workshop Eric's one, used with many thanks. Please go ahead and clone his repository if you want it locally. We have also provided a docker image you can build and run yourself to avoid having to install everything locally.
git clone git@github.com:isaacrowntree/elixir-dojo.git
cd elixir-dojo
git clone git@github.com:ericmj/workshop.git
docker build . -t elixir_dojo
docker run -it --rm -v $(PWD):/code elixir_dojo bash
cd workshop && cd labX
mix test
You should be able to work in your local root/workshop dir using your favourite editor.