Function closeWebServer

closeWebServer(
    server:
        | undefined
        | Server<typeof IncomingMessage, typeof ServerResponse>,
): Promise<void>
Gracefully closes the provided HTTP server instance.
Parameters
- server: undefined | Server<typeof IncomingMessage, typeof ServerResponse>
  The HTTP server instance to close. If undefined, the function resolves immediately.
Returns Promise<void>
A promise that resolves when the server has been closed.

Example
```
const { server } = await createWebServer({
  port: 9000,
  fetchCallback: () => new Response()
});

await closeWebServer(server
```
- Defined in library/web-server.ts:299