feat: update readme

README.md

@@ -109,6 +109,22 @@ vjG+EPEF3g8ywKaS8mZQX+sCAwEAAQ==
 -----END PUBLIC KEY-----
 ```
 
+<br>
+
+# SSH config
+
+SSH config file: `~/.ssh/config`
+```shell
+Host *
+	IdentityAgent ~/socket.ssh
+```
+
+SSH config environment:
+```shell
+export SSH_AUTH_SOCK=~/socket.ssh
+```
+
+
 <br>
 
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