title: rmarkdown flexdashboard images folder deletes itself
body: <p>My images folder deletes itself after first knitting of the document.</p>
  
  <p>I've tried self_contained = TRUE in the YAML header, doesn't work.</p>
  
  <p>(I'm not sure if this makes a difference but Shiny is embedded in the dashboard)</p>
  
  <p>Below is my code : </p>
  
  <pre><code>---
  title : app demo
  author : yeshipants
  output : 
    flexdashboard::flex_dashboard:
      orientation: rows
      self_contained : TRUE
      source_code: embed
  runtime: shiny
  ---
  
  ```{r setup}
  knitr::opts_chunk$set(cache = FALSE)
  ```
  ```{r loadPackages, cache = TRUE}  
  setwd("C:/Users/user/Desktop/Training/OCR")
  library(magick)
  ```
  Column {.sidebar data-width=350}
  -------------------------------------
  ### Input &amp; Parameters
  ```{r inputImages, cache = TRUE}
  
  selectInput("imagesToChoose", 
              label = "Choose an image to process",
              choices = c("Language example 1", 
                          "Language example 2",
                          "Jounal example"),
              selected = "Language example 1") 
  ```
  Row {.tabset}
  -------------------------------------  
  ### Original Image    
  ```{r displayImage, cache = FALSE}    
  renderImage({      
    if (input$imagesToChoose == "Language example 1"){
      list(src = "images/receipt.png", height = 240, width = 300)
    }
    else if(input$imagesToChoose == "Language example 2"){
      list(src = "images/french.JPG", height = 240, width = 300)
    }
    else if(input$imagesToChoose == "Jounal example"){
      list(src = "images/journal.jpg", height = 240, width = 300)
    }    
  })
  
  ```
  </code></pre>