Created Configure Remote Storage (markdown)

Configure-Remote-Storage.md

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+Remote Storage should be configured first before being used.
+
+Run `remote.configure` in `weed shell`:
+```
+> help remote.configure
+  remote.configure	# remote storage configuration
+
+	# see the current configurations
+	remote.configure
+
+	# set or update a configuration
+	remote.configure -name=cloud1 -type=s3 -access_key=xxx -secret_key=yyy
+
+	# delete one configuration
+	remote.configure -delete -name=cloud1
+
+```
+
+In the above example, a remote storage is configured to name `cloud1`, which is the name to reference files stored on this account.
+
+The access key and secret key can be changed on the fly.