features to mention:

• login required for upload (automatic redirect)
• alert on sign up if username or email is not available
• user session id shown in url is encrypted by md5 via User.__repr__ overload
• alert on login if email wasn't found in db
• upload: limitations on title, description, and text min length

Project design

Project structure example

├── app/
│   ├── __init__.py
│   ├── db.py
│   ├── schema.sql
│   ├── auth.py
│   ├── blog.py
│   ├── templates/
│   │   ├── base.html
│   │   ├── auth/
│   │   │   ├── login.html
│   │   │   └── register.html
│   │   └── blog/
│   │       ├── create.html
│   │       ├── index.html
│   │       └── update.html
│   └── static/
│       └── style.css
├── venv/
└── setup.py

Run app

$ flask --app flask_not_rust run