A repository for a school project.
Subject: Software Development.
Project: Flask Web Application.

• export FLASK_APP={router_name}.py
• export FLASK_ENV=development
• export FLASK_DEBUG=1
• python -m flask run

• python3 -m pip install -r requirements.txt

Instead of "from werkzeug import secure_filename, FileStorage" we have:

• from werkzeug.utils import secure_filename
• from werkzeug.datastructures import FileStorage

That fixes a strange ImportError.