VOL-3265: Documentation for image managment and moving images to images subdir

Change-Id: I220a8db8d4fc604ad0a431b416627a9c23691818
diff --git a/docs/images/device_image_management.drawio b/docs/images/device_image_management.drawio
new file mode 100755
index 0000000..5c01d87
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+++ b/docs/images/device_image_management.drawio
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