import os
c.NotebookApp.token = os.getenv('JUPYTER_PWD','')
c.NotebookApp.ip = '0.0.0.0'
c.NotebookApp.allow_root = True
c.NotebookApp.open_browser = False
c.NotebookApp.allow_password_change = False 
c.NotebookApp.notebook_dir = os.getenv('JUPYTER_DIR','/root')
c.NotebookApp.allow_credentials = True 
c.NotebookApp.allow_origin = '*'