what is duplex-server-rs fr?

duplex-server-rs is a starter template for building a backend server in Rust that can handle two different styles of communication at the same time: standard web requests (REST) and a faster, more structured method called gRPC. Instead of starting from scratch, a developer can use this project to quickly scaffold an application that manages data and serves it to websites, mobile apps, or other internal systems. The project follows a software design philosophy called Domain-Driven Design (DDD), which is a way of organizing code so that it closely mirrors real-world business concepts. In practice, this means the code is structured into clear, separate layers: commands (what you want to do, like "create a user"), events (the result of that action, like "user was created"), models (the data itself), and repositories (the logic that saves or fetches data from a database). When a request comes in, it flows through these distinct layers to process the action. A backend or systems developer would use this template to save days of setup time. For example, if you are building a new application that needs to handle high volumes of traffic, you might want the performance benefits of Rust but do not want to spend a week wiring up database connections and organizing your file structure. This repository gives you a working example with a "create user" and "get user" flow already built in, showing exactly how to add your own features alongside them. What is notable about this project is how it bridges two different communication styles using the same underlying logic. A developer can define a piece of data once, and the template makes it available to both standard web endpoints and gRPC. This means whether a standard website or a high-performance internal service is asking for data, the server handles it through the same central business logic, keeping everything consistent.