doc: Add notes on how to run docker against MobyLinux

Signed-off-by: Rolf Neugebauer <rolf.neugebauer@docker.com>

docs/windows-notes.md

@@ -81,6 +81,28 @@ and all the files can be removed with:
 .\MobyLinux.ps1 -destroy
 ```
 
+## Running Docker
+
+You need a Windows docker client matching the version running on
+MobyLinux. I build mine from source in a Linux container using `make
+cross`.
+
+
+When starting the MobyLinux VM on Hyper-V, the docker daemon is
+currently started to listen on TCP socket 2375 inside the VM.
+
+**The IP address of the VM may changes on every start**
+
+To determine the IP address, you ca either type:
+```
+Get-VMNetworkAdapter MobyLinuxVM
+```
+and then set `DOCKER_HOST` accordingly, or you can execute the PS
+snippet printed out by MovyLinux.ps1:
+```
+$vmIP=(Get-VMNetworkAdapter MobyLinuxVM).IPAddresses[0]
+$env:DOCKER_HOST = "tcp://" + $vmIP + ":2375"
+```
 
 ## Getting a serial console
 

scripts/MobyLinux.ps1

@@ -177,6 +177,10 @@ Start-MobyLinuxVM
 {
     Write-Output "Starting $VmName"
     Start-VM -VMName $VmName
+
+    Write-Output 'Connect to Docker by executing:'
+    Write-Output '$vmIP=(Get-VMNetworkAdapter MobyLinuxVM).IPAddresses[0]'
+    Write-Output '$env:DOCKER_HOST = "tcp://" + $vmIP + ":2375"'
 }
 
 function