What is the best self-hosted

You can try Arize Phoenix: https://docs.llamaindex.ai/en/stable/examples/cookbooks/oreilly_course_cookbooks/Module-5/Observability/
Its super easy to setup and use and provide great details

If you dont want to rely on third party, LlamaIndex provides in-house Instrumentation: https://docs.llamaindex.ai/en/stable/examples/instrumentation/instrumentation_observability_rundown/module which is the backbone of all the third party observability tool in LlamaIndex

I saw this one. It's nice. What do you think about langfuse?

Most of the solutions I've seen require you to clone their GitHub repository, which makes absolutely no sense at all

I just want an easy docker image