Single-page HTTP server on Boost.Beast

Why does the client need this?
- Microservice for processing API requests.
- Lightweight web interface for IoT devices.
- Foundation for scalable projects.
What does the code do?
- Runs an HTTP server on port 8080.
- Handles 3 types of requests:
- GET / — HTML page.
- GET /api — JSON response.
- Others — 404 Not Found.
- Asynchronous processing with Boost.Asio.