FWIW, I was also looking for an ebook server solution. I looked at Calibre/Calibre-web and did not at all like how that worked and how Calibre-web was dependent on the Calibre library, and I hated how janky Calibre was as a docker container.

I settled on Audiobookshelf. I already had that up and running for my audiobooks, and they’ve been adding and improving ebook support, and I’ve been very happy with Audiobookshelf for both ebooks and audiobooks.

I didn’t care for Kavita because of the folder structure it required for ebooks. I may have been biased against Kavita’s folder requirements because I already had Audiobookshelf up and running.

For Audiobookshelf, the structure is:

Author > Series Directory (if applicable) > Book Title (directory) > Book file