You can. I do. Synchronization of read status between devices is a matter of taste. Without it it's as easy as running a native RSS reader (and it doesn't even have to be the same one!) on each computer. It's easy with opml export to keep the subscriptions the same when you do add or remove on a device.

>Put it in a docker or qemu

I'm trying to avoid inserting extra abstraction layers (browserOS on top of OS) in the first place. Adding more just to contain the needless complexity of the separate webserver+database isn't my jam.