update dashboard 3.1.3 (#1608)

docs-2.0/20.appendix/release-notes/dashboard-ent-release-note.md

@@ -1,5 +1,10 @@
 # Nebula Dashboard Enterprise Edition release notes
 
+## Enterprise Edition 3.1.3
+
+- Feature
+  - Support add a node by using [SSH secret key](../../nebula-dashboard-ent/4.cluster-operator/4.manage.md).
+
 ## Enterprise Edition 3.1.2
 
 - Bugfix

docs-2.0/nebula-dashboard-ent/4.cluster-operator/4.manage.md

@@ -5,19 +5,29 @@ This topic introduces the cluster operation of Dashboard, including cluster node
 
 ## Node
 
-On this page, the information of all nodes will be shown, including the cluster name, Host(SSH_User), CPU (Core), etc.
+On this page, the information of all nodes will be shown, including the cluster name, Host(SSH_User), CPU (Core), etc. Users can add node, view node monitoring, and manage services on node.
 
-- To add a node quickly, click **Add Node** and enter the following information, the Host, SSH port, SSH user, SSH password, and select a Nebula Graph package.
+### Add node
 
-- Click the ![plus](https://docs-cdn.nebula-graph.com.cn/figures/Plus.png) button to view the process name, service type, status, runtime directory of the corresponding node.
+Click **Add Node** and enter the following information, the Host, SSH port, SSH user, authentication type, NebulaGraph package, etc., and click **OK**.
 
-  - Click **Node Monitoring** to jump to the detailed node monitoring page. For more information, see [Cluster monitoring](../4.cluster-operator/2.monitor.md).
+The authentication type are described as follows:
 
-  - Click **Service Management** to jump to the service management page.
+- SSH Password: Enter the password of the SSH user.
 
-  - Click **Edit Node** to modify the SSH port, SSH user, and SSH password.
-
-  - If a node has no service, you can **Delete Node**.
+- SSH Key: Click **Upload** and select the private key file of the node. You need to generate the secret key files on the node to be added and send the private key file to the current computer (not the Dashboard machine). If the passphrase is set, this parameter is also required.
+
+### Other node operations
+
+Click the ![plus](https://docs-cdn.nebula-graph.com.cn/figures/Plus.png) button to view the process name, service type, status, runtime directory of the corresponding node.
+
+- Click **Node Monitoring** to jump to the detailed node monitoring page. For more information, see [Cluster monitoring](../4.cluster-operator/2.monitor.md).
+
+- Click **Service Management** to jump to the service management page.
+
+- Click **Edit Node** to modify the node settings.
+
+- If a node has no service, you can **Delete Node**. For details about how to delete a service, see section **Scale** below.
 
 {{ ent.ent_begin }}    
 ## Scale