adding a short readme

Change-Id: I6fda2dd358895ae256a13dba6d033aa054795443

cmd/multinode/README.md

@@ -0,0 +1,23 @@
+# Multinode Dashboard
+
+## Reference Articles
+
+[Tech Preview Forum Post](https://forum.storj.io/t/tech-preview-multinode-dashboard-binaries/14572)
+
+## Running in Docker
+
+In order to run this docker image, you need to generate an identity like this:
+```
+identity create multinode --difficulty 10
+```
+
+Then start the image like this, while replacing the directories marked by the `< >` with your parameters below:
+
+```
+docker run -d --restart unless-stopped \
+    --user $(id -u):$(id -g) \
+    -p 127.0.0.1:15002:15002/tcp \
+    --mount type=bind,source="<identity-dir>",destination=/app/identity \
+    --mount type=bind,source="<storage-dir>",destination=/app/config \
+    --name multinode storjlabs/multinode:latest
+```