Is it possible(or recommendable) to add/install mongodb, nginx in same ec2 instance as with my nodeJS application? Will it cut my ec2 operation cost? As we are provided only 750hrs of ec2 in free tier.

What are the things I should do before deployment of my NodeJS application?

Currently, we are working on a social media type application. This application will have some vigorous calculations at backend, bulk email and bulk sms will be send to users. We are using MongoDB, NodeJS, ExpressJS, AWS. I have added cluster in it. A...