Simplify test

appveyor-test.ps1

@@ -7,9 +7,9 @@ docker rm -f whoamitest
 $ErrorActionPreference = 'Stop';
 Write-Host Starting container
 docker run --name whoamitest -p 8080:8080 -d whoami
-Start-Sleep 15
-Write-Host Testing from another container
-docker run --rm microsoft/nanoserver powershell -command invoke-webrequest -usebasicparsing http://whoamitest:8080
+Start-Sleep 10
+
+docker logs whoamitest
 
 $ErrorActionPreference = 'SilentlyContinue';
 docker kill whoamitest