diff --git a/Gruntfile.js b/Gruntfile.js
index <HASH>..<HASH> 100644
--- a/Gruntfile.js
+++ b/Gruntfile.js
@@ -105,7 +105,7 @@ module.exports = function(grunt) {
       doc: {
         expand: true,
         cwd: 'doc/',
-        src: '*.md',
+        src: ['*.md', 'img/*.*'],
         dest: 'build/doc/'
       }
     }
Copy documentation images in build

Previously only the markdown files were copied to the build folder, not
the related images.

Change-Id: Iae<I>c<I>b3eb<I>b8b5bf<I>f<I>e9ea<I>c