Book formats except epub don't work in calibre-web

Hi there,
I installed calibre-web in the sinology nas docker. All book formats can be downloaded, but only epub books get opened, the other formats just don’t work - I have no idea why.
Books In these formats don’t even open: txt,lit,prc,azw3,cbr,djv,cbz,doc,mp3,m4b,docx,odt,fb2,mobi,djvu,opus,m4a,rtf,wav,html,flac,cb7,kepub,azw,mp4,ogg,cbt,pdf
Please help to sort it out.

This does not sound like a container problem, but an application problem. I suggest you seek help from the calibre-web developer. however, only epubs are supported in the web ui book reader, afaik.