CreateUiDefinition.json for ARM Azure Web App

I created an ARM template for an azure web app. I need to publish an ARM template on azure market. I used the azure publishing portal https://publish.windowsazure.com/workspace/multi-resource-solutions to publish the ARM template.

To draw an ARM template in azure marketplace, the zip file must contain mainTemplate.json and createUiDefinition.json. I found some examples for createUiDefination.json file at https://github.com/Azure/azure-quickstart-templates , but all createUiDefination.json is for VM. I can't find samples or tutorials for createUiDefination.json for Azure Web App.

I need to check if the azure design website name already exists or not. You also need to create or use an application maintenance plan.

Is there any tutorial or sample for creating createUiDefination.json for azure web app?