How to work with a database in Heroku?

Question

Python

As the question suggests, I'm still new to programming.
I made a simple telegram bot and posted it on heroku.
In order for the bot to store data about the user, he taught him, using sqlite3, to connect to the database (or create one if there is none) and operate on the data in it.
The problem is that after the heroku puts the bot to sleep, upon waking up, no database is already in the application directory.
Can you tell me how to make it permanent?

Answer 1

No way, sqlite works with an embedded database (in a file). And the files on Heroku are temporary. Use postgres

Answer 2

https://www.mongodb.com/scale/mongodb-hosting-free
https://www.mlab.com/plans/pricing/#plan-type=sandbox
I used mlab for my bot. If Nosql is not an option, check out free hosting for sql.