How to call a function on startup and shutdown?

Question

Django

Hello. Please tell me, I want to bind a telegram bot written with aiogram to Django. The bot works through webhooks. Since the bot is asynchronous, it works with the database not through django orm, but through tortoise-orm. How can I make it so that when Django starts, a method is called to open a connection to the database, and when it ends, a method is called to end work with the database.