Best AWS alternative for React/Java webapp

Hello team! Everything is in title. I have a Java+ React + Postgresql app and I need to host it.

For now it's on AWS but I pay like 20-25 /month just for a t3 small EC2 instance + 1 Postgres RDS. It seems expensive. What if I want to have dev envs, several apps, etc… Price will skyrocket.

Do you know any alternative for hosting such apps? App is also dockerized (fyi)

Later on I'll need to have like 4-5 apps like this and thousands of users will need to connect on each app.

Thank you in advance if you have any tips or alternative for such scenarios.