At the root folder of the project, just issue the following command:
mkdir -p eth && USER=$(id -u) GROUP=$(id -g) docker-compose up
Then you can create an account, for example:
USER=$(id -u) GROUP=$(id -g) docker-compose run ethereum-geth --datadir /home/root/.ethereum account new
Don't know what to do? Explore it using the help command:
docker run --rm -it ethereum/client-go:stable --help