Test finished, health checker fixed

@@ -14,8 +14,8 @@ var languagedetect_api_url = 'https://openapi.naver.com/v1/papago/detectLangs';
 
 // Naver Auth Key
 //새로 발급받은 naver papago api id, pw 입력
-var client_id = 'xZMx34y7uru1v8lywZ2d';
-var client_secret = 'p6L7M7WsH9';
+var client_id = '743DE__EstcaLZzEsO5f';
+var client_secret = 'Y865wTpZ5y';
 
 const config = {
   channelAccessToken: 'TgqvFO0cHkSMEiRkJhLMCbfNzzO4Yhpdf8Ov+cr4tBPh2teSilW22TfEfTlxMHFBGufqslip3EYSdppQTCAThCEzf4xc6q8YEtPjF66hmyGOpLZoPK41VTWorrkOmBmmqysb11rElm50Wz6kvM/gogdB04t89/1O/w1cDnyilFU=',
@@ -29,10 +29,11 @@ const client = new line.Client(config);
 // create Express app
 // about Express itself: https://expressjs.com/
 
-// test
+// ELB health checker
 app.get('/', (req, res) => {
-	console.log('hello');
-	res.status(200);
+	console.log('hello,,,,');
+	res.writeHead(200, { "Content-Type": "text/html" });
+	res.end();
 });
 
 // register a webhook handler with middleware