This is a slightly modified version of the script example MS posted ot the Gallery, this one a) works and b) installs EVERYTHING you need to build a DSC Pull server, not just hope it's there.
The custom resource: Can be found here.
The script: Can be found here.
I would advise extracting the files to C:\Windows\System32\WindowsPowershell\v1.0\Modules and making sure you right click->Properties->Unblock the .ps1 files.
Once you create configs they go here: C:\Program Files\WindowsPowerShell\DscService\Configuration
Remember, for Pull mode the node names MUST be GUID's and those GUID's MUST match the clients ConfigurationID, you can see the clients CID by typing: