Found this the other day - a website that takes a shelf from Goodreads and turns it into a digital bookshelf using images of book spines.
I found this quite cool as a way to display books I’ve read that might be a mix of digital and physical.
When I first tried it, it was missing quite a few of the book spines. However you can submit your own by finding the spines online and giving the dimensions. At this point I’ve submitted the majority of my missing ones - the website provides fake covers if you like.
If you give it a go, the shelf name is case sensitive so be careful with that. And the book dimensions are in inches if you decide to submit any.
Goodreads is already something you don’t host locally. So if you are on that, this becomes a non-issue. Someone with your reservations on that topic (and I agree with you!) wouldn’t even use Goodreads to start with.