How to change Azure webapp service from calling hostingstart.html to different html

Question

I'm having a problem running an Azure hosted Excel web addin and hope someone can help. This is what I have done so far:

1. I successfully created an Azure webapp which I can see in a browser and is running default code from the hostingstart.html script.
2. In VS2019, I created an Excel Addin project with some basic code. The project for this starts from the Home.html script that VS2019 automatically generates. I updated the xml manifest file to point to the web app URL that I created in step 1.
3. I downloaded the xxx.PublishSettings file from Azure and used this in VS2019 to publish my application to my Azure web app.
4. If I browse the wwwroot folder in Azure, I can see all the files published by VS2019 so I know the publish action worked correctly.
5. Using the local xml manifest file, I added the addin in Excel online. When I open the addin task pane from the Excel ribbon, I see the message "Cannot get /Home.html".
6. I'm suspecting that the addin is failing because the Azure webapp is starting from hostingstart.html instead of Home.html.

This leads to my question. Should I be changing Azure somehow to start from the project's Home.html script or should the VS project be changed to run from hostingstart.html?

Thanks in advance for any help with this.

This is the screenshot of what happens when I publish the app from VS2019:

Answer 1

UPDATE

Make sure you can open https://sitename.azurewebsites.net/Home.html.

Then I think there is no need to entangle the issue of the start page. Because in the code <SourceLocation DefaultValue="~remoteAppUrl/Home.html" /> has defined this path.

If you can't access it, then there must be a bug in this excel web addin for vs2019, you can raise a support to confirm.

You don't need to do any changes in your code. You just need to modify Default document in portal.

Like below, delete all default page, and create Home.html.

Then you can access your web site.