Error fixed

@@ -22,7 +22,7 @@ const line_channel = config.line_channel;
 const client = new line.Client(line_channel);
 
 // ELB health checker
-app.get('/', (res) => {
+app.get('/', (req, res) => {
 	console.log('ELB health check');
 	res.writeHead(200, { "Content-Type": "text/html" });
 	res.end();
@@ -50,17 +50,17 @@ app.post('/webhook', line.middleware(line_channel), (req, res) => {
 // 이벤트 타입 검사 이후
 // language detector api url 및 client id, secret 을 담은 connector를 반환한다.
 const api_connect = (event) => {
-    if (event.type !== 'message' || event.message.type !== 'text') {
-		// ignore non-text-message event
-		return reject(new Error('메세지 혹은, 텍스트가 아닙니다.'));
-    }
-    return new Promise((resolve) => {
+    return new Promise((resolve, reject) => {
+		if (event.type !== 'message' || event.message.type !== 'text'){
 		//언어 감지 option
-		resolve({
-        	url : languagedetect_api_url,
-			form : {'query': event.message.text},
-			headers: {'X-Naver-Client-Id': client_id, 'X-Naver-Client-Secret': client_secret}
-		});
+			resolve({
+				url : languagedetect_api_url,
+				form : {'query': event.message.text},
+				headers: {'X-Naver-Client-Id': client_id, 'X-Naver-Client-Secret': client_secret}
+			});
+		} else {
+			reject(new Error('메세지 혹은, 텍스트가 아닙니다.'));
+		}
     })
 }