Comment by jeroenhd

The big, professional, business cloud providers aren't designed for small hobby projects with expenditure limits.

You should look into going old school and just renting a VPS with any VPS provider that's not AWS/GCP/Azure. I know the big three are super popular, as are all of these "serverless" cloud companies, but very few of them offer the most important service for a small project: shutting down before you owe them a fortune.

Depending on the guarantees you want, Oracle has a free tier with no time limit. It provides 4 ARM cores with something crazy like up to 6GB of RAM for free. You may have a few days if downtime during maintenance, but once you've allocated the resources, you'll eventually get your services back from what I can tell. Best part is, if you only use their free tier, you need to manually upgrade your account to even be able to buy anything extra. Just make sure you have backups in case Oracle pulls an Oracle.

Or you could get a VPS from a budget hoster like Contabo, which isn't free but will fit most hobby projects I know just fine. They may shut you down if they're suffering from a DDoS because of you, but you won't get a $100k bill.