Fix: update readme

Author: krung2

README.md

@@ -1,6 +1,64 @@
 # gabia-sms
 
-\*\* 주의 \*\*
+## \*\* caution \*\*
 
-이 module은 가비아에서 공식지원하는 것이 아님을 알려드립니다
+> This module is not officially supported by Gabia
 
+>this module is developing now. it can be unstable.
+
+<br/>
+
+> this library is based on <a href="https://sms.gabia.com/admin/api/">official gabiaSMS api guide</a>
+
+<br/>
+
+## before use this module <br />
+
+1. Sign Up for <a href="http://sms.gabia.com">gabiaSMS</a> Service
+
+2. Register SendingIP
+
+      -> <a href="http://sms.gabia.com/admin">gabiaSMS admin</a> -> default setting -> setting sending IP
+
+3. Register Outgoing Information
+
+      -> <a href="http://sms.gabia.com/settings">gabiaSMS setting</a> -> register outgoing information
+
+## using module <br /><br />
+
+### create module
+  ```ts
+  const gabiaId: string = 'id used in gabiaSMS';
+  const gabiaAPIKEY: string = 'APIKEY issued by gabiaSMS';
+  const gabiaRef: string = 'Any unique string to find your result of send after';
+
+  const gabiaSMSLib = gabiaSMS(gabiaId, gabiaAPIKEY, gabiaRef);
+  ```
+
+### using SMS Service
+  ```ts
+  const senderNum: string = '00011112222';
+  const receiverNum: string = '00011112222';
+  const message: string = 'test1234'; // Can't be an empty string. ''
+                                      // Don't go over 90 byte.
+                                      // if bigger than 90 byte, message will
+                                      // send slice
+
+  const res: Promise<IDefaultResData> =
+    gabiaSMSLib.sendSMS(senderNum, receiverNum, message);
+  ```
+
+### using LMS Service
+  ```ts
+  const senderNum: string = '00011112222';
+  const receiverNum: string = '00011112222';
+  const message: string = 'test1234'; // Can't be an empty string. ''
+  const subject: string = 'LMS test subject';
+
+  const res: Promise<IDefaultResData> = await gabiaSMSLib.sendLMS(
+    senderNum,
+    receiverNum,
+    message,
+    subject
+  );
+  ```