I mean like running their hypothetical control software/framework within a docker on a local server. Is that illogical? I do the same for the software that runs my ip cameras with my home server, instead of them needing to connect to some external server.
You’re ultimately right though, when it comes to docker I am at the proficiency level of “can deploy other people’s images” and not so much on the “have bothered to make my own”
You can also use komf alongside komga/kavita to just scrape metadata automatically upon import. A bit finnicky to get going (a tampermonkey script is required to give it accessible setting on the komga page) but works very well and even has a gui for identifying results and selecting the correct option if the auto scrape fails similar to jellyfin
For the actual reader part I just use komga as a server and read through Mihon (one of the tachiyomi forks) on my ereader mostly. occasionally I’ll use paperback on my iphone (although recently I’ve been trying Tachimanga, which is basically an iOS tachiyomi fork). Loads library, can sort by tag/library/date added, reads most things very well, can sync read status with the komga server (and/or manga updates or whatever), etc.