flask

flask run

$ flask run
Error: Could not locate a Flask application. You did not provide the "FLASK_APP" environment variable, and a "wsgi.py" or "app.py" module was not found in the current directory.

$ flask run -h 0.0.0.0

Options:

• -h, --host TEXT: The interface to bind to.
• -p, --port INTEGER: The port to bind to.