How to SETUP pipenv ON ubuntu 18.04 FOR python flask apps?

How do you setup a Python 3.7 and pipenv production environment on Ubuntu 18.04?

My development environment uses Python 3.7, Flask, and Pipenv. All the tutorials I found only show how to use python3.7 -m venv, pip, and the likes. For example,

• https://www.digitalocean.com/community/tutorials/how-to-serve-flask-applications-with-uswgi-and-nginx-on-ubuntu-18-04
• https://follow-e-lo.com/2019/07/01/ubuntu-18-04-set-up-python/

Google doesn’t seem to show results on using pipenv for production. Any idea?

FYI: I’m using Ubuntu 18.04, Nginx, Python 3.7, Pipenv, Flask, PostgreSQL.