docs: [ci skip] add drone document. (#39)

DOCS.md

@@ -1,30 +1,14 @@
-Use the SSH plugin to execute commands on a remote server. You will need to
-supply Drone with a private SSH key to being able to connect to a host.
+---
+date: 2017-01-29T00:00:00+00:00
+title: SSH
+author: appleboy
+tags: [ publish, ssh ]
+repo: appleboy/drone-ssh
+logo: term.svg
+image: appleboy/drone-ssh
+---
 
-## Config
-
-The following parameters are used to configure the plugin:
-
-* **host** - address or IP of the remote machine
-* **port** - port to connect to on the remote machine
-* **user** - user to log in as on the remote machine
-* **passsword** - password to log in as on the remote machine
-* **key** - private SSH key for the remote machine
-* **timeout** - timeout for the tcp connection attempt
-* **script** - list of commands to execute
-
-The following secret values can be set to configure the plugin.
-
-* **SSH_HOST** - corresponds to **host**
-* **SSH_PORT** - corresponds to **port**
-* **SSH_USER** - corresponds to **user**
-* **SSH_PASSWORD** - corresponds to **password**
-* **SSH_KEY** - corresponds to **key**
-* **SSH_TIMEOUT** - corresponds to **timeout**
-
-## Examples
-
-Example configuration in your .drone.yml file for a single host:
+Use the SSH plugin to execute commands on a remote server. The below pipeline configuration demonstrates simple usage:
 
 ```yaml
 pipeline:
@@ -39,15 +23,15 @@ pipeline:
       - echo world
 ```
 
-Example configuration in your .drone.yml file for multiple hosts:
+Example configuration in your `.drone.yml` file for multiple hosts:
 
-```yaml
+```diff
 pipeline:
   ssh:
     image: appleboy/drone-ssh
     host:
-     - foo.com
-     - bar.com
++    - foo.com
++    - bar.com
     user: root
     port: 22
     script:
@@ -55,7 +39,60 @@ pipeline:
       - echo world
 ```
 
-In the above example Drone executes the commands on multiple hosts
-sequentially. If the commands fail on a single host this plugin exits
-immediatly, and will not run your commands on the remaining hosts in the
-list.
+Example configuration for success build:
+
+```diff
+pipeline:
+  ssh:
+    image: appleboy/drone-ssh
+    host: foo.com
+    user: root
+    password: 1234
+    port: 22
+    script:
+      - echo hello
+      - echo world
++   when:
++     status: success
+```
+
+Example configuration for tag event:
+
+```diff
+pipeline:
+  ssh:
+    image: appleboy/drone-ssh
+    host: foo.com
+    user: root
+    password: 1234
+    port: 22
+    script:
+      - echo hello
+      - echo world
++   when:
++     status: success
++     event: tag
+```
+
+# Parameter Reference
+
+host
+: target hostname or IP
+
+port
+: ssh port of target host
+
+user
+: account for target host user
+
+password
+: password for target host user
+
+key
+: plain text of user private key
+
+script
+: execute commands on a remote server
+
+timeout
+: Timeout is the maximum amount of time for the TCP connection to establish.