Function createWebServer

createWebServer(
options: WebServerOptions,
): Promise<{ address: AddressInfo; server: Server }>
Creates and starts an HTTP web server on the specified port.
Parameters
- options: WebServerOptions
  The configuration options for the web server.
  
  Configuration options for the web server.
  - fetchCallback: FetchCallback
    A callback function to handle fetch requests.
  - Optionalport?: number
    The port number on which the server will listen. Defaults to 0 if not specified.
Returns Promise<{ address: AddressInfo; server: Server }>
A promise that resolves to an object containing the created server instance and its address information.

Example
```
const { server } = await createWebServer({
  port: 9000,
  fetchCallback: (ctx) => {
     if (ctx.method === 'GET' && ctx.path('/')) {
       return new Response('OK');
     }

     return new Response();
  }
});
```
- Defined in library/web-server.ts:263