docs: update readme

README.md

@@ -80,20 +80,28 @@ SSH Proxy Setting:
 * proxy_cipher - the allowed cipher algorithms. If unspecified then a sensible
 
 ### Setting up SSH Key
+
 Make sure to follow the below steps while creating SSH Keys and using them.
-* Login with username specified in Github Secrets.
+Login with username specified in Github Secrets. Generate a RSA Key-Pair:
-* Generate a RSA Key-Pair. 
+
  ```bash
  ssh-keygen -t rsa -b 4096 -C "your_email@example.com"
  ```
-* Add newly generated key into Authorized keys. Read more about authorized keys [here](https://www.ssh.com/ssh/authorized_keys/).
+
+Add newly generated key into Authorized keys. Read more about authorized keys [here](https://www.ssh.com/ssh/authorized_keys/).
+
 ```bash
 cat ~/.ssh/id_rsa.pub >> ~/.ssh/authorized_keys
 ```
-* Copy Private Key content and paste in Github Secrets. 
+
+Copy Private Key content and paste in Github Secrets.
+
 ```bash
 clip < ~/.ssh/id_rsa
 ```
+
+See the detail information about [SSH login without password](http://www.linuxproblem.org/art_9.html)
+
 ### Example
 
 Executing remote ssh commands using password.