I want some advice regarding my architecture and hosting options. I'm attempting to build an e-commerce site for e-books. It will use nestJS for the backend and ReactJS+Typescript for the frontend. Postgresql will be the DB. I want to use Elasticsearch to provide search capabilities.
Initially, I thought to host each of these projects in their own server. But since I'll be using Elasticsearch for the portion most in need of scalability; I can put the front and back ends on the same server. Something akin to this:
I would still need the backend as a separate project to perform user authentication and other utilities.
Does this make sense? Would a monolithic architecture work better in this case? I'm not serving multiple frontends nor would backend API be public. Maybe it will present an issue if I succeed with this and think of making a mobile app.
I was thinking of starting with the digital ocean as my hosting platform; I'd need three servers at minimum (DB, es, and front+back-ends).
I would love to read your insights.