To be fair, express is a production server itself whereas werkzeug is not, so you need to add something like gunicorn or uwsgi (yeah I know nginx supports uwsgi_pass natively). click is not necessary in production though (it's only used in the dev CLI).

That said, 4 dependencies is the norm in Python land, whereas 13 dependencies is an outlier in JS land.

Edit: oops, misread, gp said express has 51 deps, not 13.