Terminal kills after few hours

Hey,

I got my VPS since a few days and it was working fine. I am facing a problem now that everything is running fine and I screened my vps but after 2/3 hours the terminal gets randomly killed and I have to re-run my main.py file by myself.
https://www.linkpicture.com/view.php?img=LPic63062b129cc2d501842780

This link shows what I see, I log back on it and it has some errors but those are just from my bot and that's fine. But you can see it just says killed, I need this to stop happening as when I am going to sleep and wake up the bot is offline.

This is about Discord.PY