contentFolder outside nano_photos_provider2 folder doesn't work

[vm75]

First of all, thanks for a great tool. It is super powerful.

I am not sure if I am missing some step here.
I am running nano_photos_provider2 in a nginx+php docker.
Path of nano_photos_provider2:
/config/www/nano_photos_provider2
If albums are inside /config/www/nano_photos_provider2 and I set contentFolder = "albums", it works as expected.
If albums are in /config/www/albums and I set contentFolder = "/config/www/albums", it generates thumbnails/data as expected, but shows only blurred images and image file are not found.
I looked at the errors and the images are being fetched from:
https://example.com/nano_photos_provider2/config/www/albums/album1/photo1.jpg and Error 404 is seen.