Forward non-http ports and non-localhost ips

### Is there an existing issue for this?

- [X] I have searched the existing issues

### OS/Web Information

- Web Browser: Safari
- Local OS: MacOS
- Remote OS: Linux
- Remote Architecture: amd64
- `code-server --version`: 4.8.0

### Steps to Reproduce

1. Spawn a service in a neighbour container
2. Under ports, paste container-ip:host
3. It tells remotehost:port is forwarded, but it is unable to do

When I open the forwarded URL proxy, it says

```
connect ECONNREFUSED 0.0.0.0:8080
```

### Expected

The service running at remotehost:port should be forwarded via web proxy

### Actual

Only locally running ports are being forwarded and remorehost:port is not being forwarded unlike VS Code Desktop. It is not even respecting the host part and just attempting to forward a locally running port.

### Logs

_No response_

### Screenshot/Video

_No response_

### Does this issue happen in VS Code or GitHub Codespaces?

- [X] I cannot reproduce this in VS Code.
- [X] I cannot reproduce this in GitHub Codespaces.

### Are you accessing code-server over HTTPS?

- [X] I am using HTTPS.

### Notes

_No response_