Maybe take a look at Komga.
It does support both ebooks and graphic novels, has koreader sync for progress and can even share/distribute stuff via OPDS to koreader and other clients that support OPDS.
However file uploading is not directly possible, maybe this would work with something like a Nextcloud server?!
Maybe take a look at Komga. It does support both ebooks and graphic novels, has koreader sync for progress and can even share/distribute stuff via OPDS to koreader and other clients that support OPDS.
However file uploading is not directly possible, maybe this would work with something like a Nextcloud server?!