How to prevent VPS freezing?

Question

Amazon Web Services

Good day.
The question concerns a trial server for a year.
There is a VPS from Amazon, the program is running on it. It works and does not require intervention. But the trial VPS stops working from time to time, you need to start it again from your personal account. If you connect to the server once a month, then the work is not interrupted.
Actually the question is what to do so that you don’t have to constantly connect, and the server’s work is not interrupted.

Answer 1

Hm. Amazon has amazing support. Why not direct this question to them?

Answer 2

You drive in the Amazon there is no falling asleep, confusing with heroku