first sync

shuffle/backend/go-app/README.md

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+# Run
+go run main.go walkoff.go docker.go
+
+## Modify
+- Make sure it's connected with the latest version of the shuffle-shared library, which is used to get resources from Shuffle
+
+## Database
+- The database is Opensearch and can be modified with the SHUFFLE_OPENSEARCH_URL environment variable. See .env in the root directory for more. This requires Opensearch to be running (typically started from docker-compose.yml)
+```
+docker-compose up -d
+docker stop shuffle-backend
+docker stop shuffle-frontend
+docker stop shuffle-orborus
+```
+
+## Caching
+- To handle caching, it by default runs it in memory of the application itself. If you want to offload this, it can be done using the SHUFFLE_MEMCACHED environment variable, connecting to a memcached instance. 
+```
+docker run --name shuffle-cache -p 11211:11211 -d memcached -m 1024
+```