Example of reproducible building

Dockerfile

https://github.com/scidash/sciunit/blob/master/docker/Dockerfile
```
FROM jupyter/datascience-notebook
RUN apt-get update && \
    apt-get upgrade -y

# Install Python, pip and swig
RUN apt-get install -yq --no-install-recommends python3-dev python3-pip swig gosu nano


RUN python brian2-sims/simulations/stdp.py
ENTRYPOINT /bin/bash 
ENTRYPOINT python brian2-sims/simulations/stdp.py
```

@pabloabur