What’s the application’s deployment architecture?

Forces

There is a team of developers working on the application

New team members must quickly become productive

The application must be easy to understand and modify

You want to practice continuous deployment of the application

You must run multiple instances of the application on multiple machines in order to satisfy scalability and availability requirements

You want to take advantage of emerging technologies (frameworks, programming languages, etc)

Solution

Build an application with a monolithic architecture. For example:

a single Java WAR file.

a single directory hierarchy of Rails or NodeJS code

https://microservices.io/patterns/monolithic.html