the path problem in tutorial section of document which the caption is **Creating an Express Application with LoopBack REST API**

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### Describe the bug

I just follow the tutorial to creating an express application with loopback REST API in codebox.

after follow the tutorial to create an application use `lb4 app Note`,add Note model, add a datasource, there is no mistake.

However in the part Create a Facade Express Application（https://loopback.io/doc/en/lb4/express-with-lb4-rest-tutorial.html#create-a-facade-express-application）

the code block invoked error and the mistake message as follow:

### 1. the import path that invoked error
```js
import {ApplicationConfig, NoteApplication} from './application';
```
### mistake massage
```js
the application can't found the module
```
### 2. can't find http.ts
```
export class ExpressServer {

public server?: http.Server;

constructor() {}
}
```
### mistake message
**can not find namescape http.ts**

**and over the issue of import the file , the `server.ts` file can be import as `import {ApplicationConfig, NoteApplication} from './server';` there is no mistake. I don't know why.**

### Logs

_No response_

### Additional information

_No response_

### Reproduction

https://codesandbox.io/s/patient-microservice-x0vy44?file=/note/src/index.ts

Start with the “Create a Facade Express Application” section of the linked tutorial and reproduce the problem in the provided CodeSandbox. Compare the documented imports and http reference with the generated application files, including server.ts. Done when the tutorial example runs without the reported module or namespace errors.

Written by the indexing model from the issue text.