[Question] When hitting the import API on localhost:1157/api/monitors/import , it is giving ERROR.

### Is there an existing issue for this?

- [x] I have searched the existing issues

### Current Behavior

When hitting the import API on localhost:1157/api/monitors/import , it is giving ERROR.
Also localhost:4200/api/monitors/import gives ERROR.

But when I use to hit "192.163.15.20:4200/api/monitors/import", where 192.163.15.20 is any VM where I am running separate (other) Hertzbeat.

WHY I cant able to hit my localhost API?

### Expected Behavior

When I give localhost in api it should get import. (import of JSON file I am doing)

### Steps To Reproduce

_No response_

### Environment

```markdown
HertzBeat version(s):1.6.1
```

### Debug logs

I have used 1157/api/xxx also but the error I am getting is- I/O error on POST request for "http://localhost:1157/api/monitors/import": Failed to connect to localhost/[0:0:0:0:0:0:0:1]:1157

when I use 4200/api/xxx- 504 Gateway Timeout: "Error occurred while trying to proxy: localhost:4200/api/monitors/import"

### Anything else?

_No response_

Start by reproducing the POST request to /api/monitors/import against localhost:1157 and localhost:4200 using the reported HertzBeat 1.6.1 environment, then compare it with the VM address that works. Inspect the reported connection-refused and proxy-timeout messages and the API or proxy configuration; done means JSON import succeeds through the localhost endpoint.

Written by the indexing model from the issue text.