Please help (images for floorplan)

Hello all newbie here. I am trying to add images to add an interactive floorplan and following the steps. I have installed the studio code server add on and when loading it up im not sure if maybe i am doing something wrong? All tje guides state i have to add the files into the www folder however it isnt there. I have tried adding a file direct on scs however when trying to find the file on yaml i am unable. Please help.

Maybe start here?