I have an image i\'d like to embed into my shiny app, and have read as much as I can find on how to do it. Although, all I get is a blue question mark when I run my code.
I was having the same problem. To solve this, just create a folder named 'www' in the same folder as your app.R script and put the images within that folder.
I found the solution to this problem in the tutorial video in this page: Shiny Tutorial Video - Adding Static Content Watch from 1h45min00sec.