research.py uses NotebookApp options which are incompatible with ServerApp used by latest research image

[plazadeloslagartos]

#142

https://jupyter-server.readthedocs.io/en/latest/operators/migrate-from-nbserver.html

Because the run options specified are incorrect, kernel startup fails with .vs-code extension as disable_check_xsrf and tornado options are not set by ServerApp (still works with web browser for some reason, i suppose the browser sends a null _xsrf when invoking POST). Changing the option descriptions in accordance with the above migration guide remedies the issue (c.NotebookApp -> c.ServerApp, jupyter_notebook_config.py -> jupyter_server_config.py).