Cache and resize images in entries using Lumis imgsizer, Matrix, and Stash

index.html

{!--

  # FIELDS  
  1. Matrix: images
     * File:    image
     * PT Pill: alignment (left, right, or block)
     * Text:    description
     * PT Pill: width
  
  2. Textarea/WYSIWYG: body

  # PLACING IMAGES IN THE ENTRY  
  The entry author will need to enter tags for the images' corresponding row numbers into the body.
  Ex. `{1}`

--}

{exp:channel:entries
 channel  = "channel_name"
 limit    = "1"
}

  {!-- This must be before the exp:stash:get tag --}
  {images}
    {exp:stash:set name="{row_count}"}
      {exp:imgsizer:size class="{alignment}" src="{image}" alt="{description}" width="{size}"}
    {/exp:stash:set}
  {/images}

  {exp:stash:get}{body}{/exp:stash:get}

{/exp:channel:entries}