How do I implement Import and Export code into node.js web app

Clash Royale CLAN TAG#URR8PPPHow do I implement Import and Export code into node.js web app
On this github link, a solution to add importing and exporting of images to the Teachable Machine boilerplate web app is posted, but try as I may I have not been able to figure out how to implement the code. The solution has dead link on how to implement it.
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It's unclear what you're asking. The question is very specific to the repo you're dealing with. The title is misleading. Did this comment not help at all? github.com/googlecreativelab/teachable-machine-boilerplate/… A user has already written the code for you which is very specific and seems to not require any other link.
– estus
5 mins ago