Basically what is needed is are a webserver, that serves static files (jpg, mp3, etc), to be installed locally on your machine. There are many way to do that. Using Python httpserver is a portable and quick way, which is possible on any OS with python installed. For windows there is an instruction here: https://stackoverflow.com/a/5128451. See also other answers.
That approach may seem dirty (but it should work!). More elegantly, Ibex server seems to use SimpleHttpserver already, so it is possible to configure it to serves static files from a folder in ibex folder structure (e.g., using relative path). This however requires some programming skill.