Subfolder in Magento 2 root folder?

Hi /r/magento, I wonder if it’s possible to have a subfolder in the M2 root folder which is a custom and independent page (index.html). Whenever I create something like this, Magento will throw an 404 Error. I guess it’s looking for a Magento controller (www.mysite.com/mycustomfolder/index.html).

Is there a way to tell Magento that this is an independent page which has nothing to do with the Magento installation? Unfortunately I need this page in this place because many customers have bookmarked this path. It’s just an info page but it worked fine with M1.

Thanks