[request] map host ip to localhost site

[yhorndt]

Hi,
It would be cool to have a property in the sites.json, to be able to call that this site is running on the host of the jump instance.
And then for jump to automatically fill in the ip from the host network.

For example:
jump runs in docker and maps to localhost 8123.
The docker runs on the host that has ip: 192.168.1.23

If the property local: true is set in the sites.json, for a site that is defined as localhost:2345, jump will find the host ip and fill this in behind the scenes. So that in the jump page, you can click on the site and it will redirect you to 192.168.1.23:2345.