Very well written.

- I have nodejs server for the APIs and its running on m5.xlarge instance. I haven't done much research on what instance type should I go for. I looked up and it seems like c5n.xlarge(mentioned in the article) is meant compute optimized. That cost difference isn't much between m5.xlarge and c5n.xlarge. So, I'm assuming that switching to c5 instance would be better, right?

- Does having ngnix handle the request is better option here? And setup reverse proxy for NodeJS? I'm thinking of taking small steps on scaling an existing framework.