So if you are like me and like to tinker about with different platforms you might be wondering how to update the URL for Ghost on a synology NAS docker image.
After some digging I found out just how simple it was, rather than showing http://localhost:2345 mine now shows the correct URL.
If the docker environment variables simply add
Variable = url
Value = https://yourdomain.com
Start up your Ghost container and all should be good
Check out my other site running on Ghost https://rhodzy.com