Build an (encrypted) GoogleDrive alternative using OnlyOffice?

[OnlyOffice](https://onlyoffice.com/) already offers an extensive user interface and underlying logic for a file manager, document editing etc.
So would it in theory be possible to use OnlyOffice to create an end-to-end-encrypted alternative to GoogleDrive by use OnlyOffice as the frontend and "only" having to build all the backend stuff?

build encrypted privacy