Add binder badge to README

Author: tbody-cfs

README.md

@@ -4,5 +4,6 @@ cfspopcon: 0D Plasma Calculations & Plasma OPerating CONtours
 [![Build Status](https://github.com/cfs-energy/cfspopcon/actions/workflows/workflow_actions.yml/badge.svg)](https://github.com/cfs-energy/cfspopcon/actions)
 [![Checked with mypy](http://www.mypy-lang.org/static/mypy_badge.svg)](http://mypy-lang.org/)
 [![Documentation Status](https://readthedocs.org/projects/cfspopcon/badge/?version=latest)](https://cfspopcon.readthedocs.io/en/latest/?badge=latest)
+[![Binder](https://mybinder.org/badge_logo.svg)](https://mybinder.org/v2/gh/cfs-energy/cfspopcon/HEAD)
 
 For more information please have a look at our [documentation](https://cfspopcon.readthedocs.io/en/latest/).