demo_flask

For lab №6-7

• Migrate commands https://flask-migrate.readthedocs.io/en/latest/
• Add СlI commands https://flask.palletsprojects.com/en/3.0.x/cli/
• Add login and register with DB, store password in DB https://flask-bcrypt.readthedocs.io/en/1.0.1/
• Add module flask-login https://flask-login.readthedocs.io/en/latest/