This is an Node/Express based simple proxy. It will take a query for term and do a request to https://itunes.apple.com/search?term= and respond with the response from Apple, if the requester is from CodePen or localhost.
It has been created as part of a blog post on dev.to: Small API based web app.
The POC using this service can be seen here: POC from post on dev.to: Small API based web app