I have had several Flask app running on Digitalocean.
For setup i have followed this How To Serve Flask Applications with Gunicorn and Nginx on Ubuntu 16.04.
Today i would have chosen How To Serve Flask Applications with Gunicorn and Nginx on Ubuntu 18.04.
Then use newer Python 3.6 --> that also has virtual environment build in(no install).
It also easier if has a GitHub/BitCucket repo with content of Flask app.
Then is
For setup i have followed this How To Serve Flask Applications with Gunicorn and Nginx on Ubuntu 16.04.
Today i would have chosen How To Serve Flask Applications with Gunicorn and Nginx on Ubuntu 18.04.
Then use newer Python 3.6 --> that also has virtual environment build in(no install).
It also easier if has a GitHub/BitCucket repo with content of Flask app.
Then is
git clone url_to_repo
to get all files to DO.