message: Workaround a Notebook bug in in c.NotebookApp.ip
  See I found this by
  checking package version differences and hunting for recent issues on
  Notebook's github page.
diff: @@ -16,7 +16,7 @@ import os
  from IPython.lib import passwd
  c = c # pylint:disable=undefined-variable
  -c.NotebookApp.ip = '*'
  +c.NotebookApp.ip = '0.0.0.0' # https://github.com/jupyter/notebook/issues/3946
  c.NotebookApp.port = int(os.getenv('PORT', 8888))
  c.NotebookApp.open_browser = False
  