Replace domain for container webui with document.domain

[YKPDang]

Right now the webui links all point to the IP of unRaid in the local network (e.g. 192.168.0.5). If one uses a VPN or has a domain that points to the webui, the container links to the webui will still point to 192.168.0.5. This PR replaces the hostname of the URL to the webui with document.domain, ensuring that the URL to the container webUIs is always using the same hostname as the one the user is currently using.

[bergware]

Sorry, but this breaks access to any docker container running on a custom IP address.

[ljm42]

Thank you for the submission, but we aren't able to merge it as it will break containers that run on their own IP address.