It would be great if there was a global setting to automatically thumbnail images in posts without user interaction.
I would really appreciate if it could be an admin setting where you could set a thumbnail-size for all uploaded images, if you click on them they will show the original image in full size.
I know there is a plugin (nodebb-plugin-image-sizer) that does resize images, but requires user knowledge.
If it helps you, I've started a plugin here:
It's still in development - I haven't had the capacity lately to finish it just yet. If anybody wants to take a crack at it though that would be awesome