修正域名正则不支持端口

jekyll 没法直接调试

```
'http://localhost1:4000'.match(/:\/\/([\w\.\-]+)/)
["://localhost1", "localhost1"]
'http://localhost1:4000'.match(/:\/\/([\w0-9\-_\.]+?)\//)
null
```

正则来自 https://github.com/tg123/chrome-hostadmin/blob/master/container/chrome/container.js#L32