I'm trying to run this simple sitecore docker demo project https://github.com/Sitecore/docker-demo/tree/develop/sitecore/9.0.1%20rev.%20171219%20XM1/VS2017/SimpleSample
However I keep getting this error:
1>Step 9/13 : RUN Rename-Item -Path $env:SITEPATH -NewName $env:DEFAULTWEBSITENAME; New-Item -Path $env:SITEPATH -ItemType Directory | Out-Null; 1> ---> Running in 8b683e2bef08 1>[91mRename-Item : Cannot bind argument to parameter 'Path' because it is null.
I can't find $env:SITEPATH being set in solution. Feels like Im missing some step here but can't figure out.
Looks like this issue has been raised but never answered: https://github.com/Sitecore/docker-demo/issues/12