I am developing a modular monolith web application Spring Boot + Postgresql database using Elastic Beanstalk - EC2 + RDS. I am looking for a preferable way to deploy my app to AWS. Should I just deploy jar/war using file uploader. Is that a good practice?
Depends. If this is something that you have to do often, then maybe you could consider setting up the proper CodePipeline with Elastic Beanstaslk target.