Type Alias Middleware

Middleware: ((req: Request, next: (() => Promise<Response>)) => Promise<Response>)

Type of middleware function that processes the request before or after the main route handler.

Type declaration

- (req, next): Promise<Response>
- Parameters
  - req: Request
    The HTTP request object.
  - next: (() => Promise<Response>)
    A function to call the next middleware or route handler.
    - (): Promise<Response>
      Returns Promise<Response>
  Returns Promise<Response>
  A promise resolving to an HTTP response.
  
  Example of a middleware function:
```
import { start, router, text, type Middleware } from "@pulsar-http/core";

const logMiddleware: Middleware = async (req, next) => {
    const response = await next();
    console.log(`Request ${req.method} ${req.url} - Response ${response.status}`);
    return response;
};

const routes = [
    router.get("/", async () => text("Hello, World!")),
];

start({ routes, middlewares: [logMiddleware] });
```
  In this example, the logMiddleware will wait for the next middleware or route handler to finish processing the request, log the request and response information, and then return the response.