What is a replay Server?

Hi there, i am trying to do replay in Dedicated server and its associated clients. In the documentation (HTTP Streamer REST API for Unreal Engine | Unreal Engine 5.2 Documentation) it has been said that “Http streamers will make a request and it must be handled by the YOUR replay Server”.

My question is , Should I have to create a Server in Apache or could i do this ( Creation of a server) in the Unreal Engine itself. ?? Please Help me.

This has been dormant for a while but just in case anybody is still looking for an answer…
Yes you will have to write / implement a custom http server that will respond to the http requests mentioned in (https://dev.epicgames.com/documentation/en-us/unreal-engine/http-streamer-rest-api?application_version=4.27)

There is an implementation available that i found on github (not verified)