Azure Docker VM extension for GeoServer

geoserver.json

{
          "type": "extensions",
          "name": "DockerExtension",
          "tags": {
            "displayName": "DockerExtension"
          },
          "apiVersion": "2016-03-30",
          "location": "[resourceGroup().location]",
          "dependsOn": [
            "[resourceId('Microsoft.Compute/virtualMachines/', variables('vmName'))]"           
          ],
          "properties": {
            "publisher": "Microsoft.Azure.Extensions",
            "type": "DockerExtension",
            "typeHandlerVersion": "1.2",
            "autoUpgradeMinorVersion": true,
            "settings": {
              "compose": {
                "geoserver": {
                  "image": "winsent/geoserver:2.11",
                  "ports": [ "8080:8080" ],
                 }
              },
              "installonly": "false"
            }
         
          }
        }