Before I started to host a bookmark service i made some investigation, and the final dockerized contenders in 2023 for what relates to memory were:

Shaarli: (~ 50Mb of RAM )

Shiori: ( ~30Mb of RAM but lacks quite some features)

linkding ( ~200Mb of RAM)

In the end i went with Shaarli

I use netcup cheapest VPS server, so far it runs SearXNG, Shaarli and Miniflux all dockerized and they all run without problems, given the fact that they are all single user instances.