Initial Backstage setup

packages/README.md

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+# The Packages Folder
+
+This is where your own applications and centrally managed libraries live, each
+in a separate folder of its own.
+
+From the start there's an `app` folder (for the frontend) and a `backend` folder
+(for the Node backend), but you can also add more modules in here that house
+your core additions and adaptations, such as themes, common React component
+libraries, utilities, and similar.