update docs

Author: giannisdoukas

docs/index.rst

@@ -33,7 +33,7 @@ used by `mybinder <https://mybinder.org/>`_. Now, by writing Jupyter Notebook an
 configuration, the community can not only execute the notebooks remotely but also to use them as steps in scientific
 workflows.
 
-* Install ipython2cwl
+* Install ipython2cwl: :code:`pip install python2cwl`
 * Ensure that you have docker running
 * Create a directory to store the generated cwl files, for example cwlbuild
 * Execute :code:`jupyter repo2cwl https://github.com/giannisdoukas/cwl-annotated-jupyter-notebook.git -o cwlbuild`