One other thing @approxinfinity can do is enable “drag and drop” image uploading, which NodeBB has bundled with every installation.
He needs to just register an “imgur” key, and whenever you drag and drop images into your post create/reply box, it will automatically get uploaded to imgur, no fuss, no muss.
Something to consider
p.s. Drag 'n drop image uploading also handles the image embed syntax, too! Bonus!