/__webpack_hmr 404

```
"GET /__webpack_hmr HTTP/1.1" 404 152 "https://...../" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_3) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/72.0.3626.121 Safari/537.36"
```

- `code-server` version: master branch
- OS Version: ubuntu

#### Steps to Reproduce

1. open coder ide