Docker Extension

dockerextension.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:2.10",
              "ports": [ "8080:8080" ]
            }
          }
        },
        "protectedSettings": {
        }
      }
}