整个项目会用到的扩展包
```
# 用于连接 Mysql 的在扩展
(.venv) root@airvip:~/python_app/flask-demo# pip install flask-sqlalchemy
(.venv) root@airvip:~/python_app/flask-demo# pip install pymysql
# Cache
(.venv) root@airvip:~/python_app/flask-demo# pip install redis
(.venv) root@airvip:~/python_app/flask-demo# pip install Flask-Caching
# 队列
(.venv) root@airvip:~/python_app/flask-demo# pip install celery
# JWT 安全
(.venv) root@airvip:~/python_app/flask-demo# pip install flask-jwt-extended
# 部署
(.venv) root@airvip:~/python_app/flask-demo# pip install gunicorn
```
