After Sending __coverage__ object from browser to express server running in docker container , istanbul reporter is creating __root__ directory under coverage folder

[akki-12345]

In my angular project, I am able to instrument all typescript files using webpack and istanbul-instrumenter-loader. After this I am sending coverage object to express server running in docker container through POST request.

After receiving coverage object on the server side, I am adding that to the istanbul collector and then I am passing istanbul collector to the istanbul reporter for generating html reports.

But istanbul reporter is creating root directory inside coverage directory. Because of this I am not getting correct HTML reports.
How to avoid the creation of root directory???????

express_server.js:

coverage report:

I am not getting above issue when I am running express server on local machine.