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shuffle/backend/README.md

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+# Backend 
+This folder has all parts necessary for the backend to run locally and in Docker
+
+## Structure
+* go-app: 	The backend. Modify these to edit the backend API.
+* database: The datastore database.
+* app_sdk: 	The app_sdk for apps. MIT licensed. 
+* app_gen: 	Code used when generating docker images. MIT licensed
+* tests: 		A bunch of cronscripts. There are no real, good tests yet
+
+## Development
+Shuffle's backend is written in Go, with apps being python (for now). More about local development can be seen in the main README.
+
+Running the backend:
+```bash
+cd go-app
+go run main.go docker.go walkoff.go
+```