Adding Docker-PowerShell demo (#1862)

demos/Docker-PowerShell/Docker-PowerShell.ps1

@@ -0,0 +1,29 @@
+# This is a short example of the Docker-PowerShell module. The same cmdlets may be used to manage both local & remote machines, including both Windows & Linux hosts
+# The only difference between them is the example container image is pulled & run.
+
+# Import the Docker module
+#    It's available at https://github.com/Microsoft/Docker-PowerShell
+Import-Module Docker
+
+# Pull the 'hello-world' image from Docker Hub
+Pull-ContainerImage hello-world # Linux
+# Pull-ContainerImage patricklang/hello-world # Windows
+
+# Now run it
+Run-ContainerImage hello-world # Linux
+# Run-ContainerImage patricklang/hello-world # Windows
+
+# Make some room on the screen
+cls
+
+# List all containers that have exited
+Get-Container | Where-Object State -eq "exited"
+
+# That found the right one, so go ahead and remove it
+Get-Container | Where-Object State -eq "exited" | Remove-Container
+
+# Now remove the container image
+Remove-ContainerImage hello-world
+
+# And list the container images left on the container host
+Get-ContainerImage