--preload-file works when running locally but not when deployed as a github page

Hello,
I'm trying to catch what I'm maybe doing wrong but after a bunch of hours I'm sort of giving up.

I'm packing some data under a folder ( specifically a `.ttf` file and a `.png` ) and when I build and run locally ( through `emrun` ) the resources are loaded correctly. I can see the font being visualized correctly ( I'm using ImGui ) and the image looks good as well ( I'm using OpenGL and stb_image to load it ). Here's a little screenshot:

I created a workflow action in github to deploy the files as a github page but this is what I get instead:

It looks like the files are actually loaded ( I don't get asserts or errors from ImGui or stb_image ) but the font seems to be ignored and the image is entirely black. I'm guessing there's something I should setup in order to have the github page working properly.

Are there any aspect I should keep in mind which are automatically addressed when running the webserver locally through `emrun`?