v1.3.2, update readme

README.md

@@ -69,6 +69,16 @@ location /.well-known/acme-challenge/ {
 }
 ```
 
+通过命令行交互创建DNS挑战证书：
+```shell
+acme-client --allow-interact -t dns --email email@example.com -d example.net
+```
+
+出现以下提示时需要自行配置DNS，配置完成后按"回车"：
+```shell
+[INFO ] You need to config dns manually, press enter to continue...
+```
+
 
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