Stop using serverless if you don’t know what the fuck you’re doing
Every fucking week, I see geniuses on reddit and tiktok wake up to $10 000 bills because they accidentally triggered billion Lambda functions in a project with four users (three of them Google bot). Or they shared it on discord, someone got offended because they thought you were trying to steal their discord kitten with your "vibecoding skills," bought a DDOS, and launched the egress fees into the stratosphere.
Unless your cloud provider enforces a hard spending cap (most don’t) or a free tier with strict limits just rent a fucking VPS. A $5 VPS can handle hundreds to thousands of concurrent users if your app is just basic CRUD and it can't ever cost more than $5. Ask your agent to set it up if you can't do it yourself.
Serverless is for when you need your site to survive a $10M Super Bowl ad without crapping itself.