[FIx] Puppeteer

@@ -5,7 +5,7 @@ async function login(id, pw) {
   try {
     //for visibility, headless: false
     const browser = await puppeteer.launch({
-      headless: false,
+      headless: true,
       args: [
         "--window-size=1920x1080",
         "--start-maximized",

@@ -65,7 +65,9 @@ const Login = () => {
       );
       if (loginResult === "failed") {
         setState({ ...state, btn: "Login" });
-        alert("ID/PW를 확인해주세요");
+        alert(
+          "ID/PW를 확인해주세요\n(크롤링 오류일 수 있습니다. 다시 시도해주세요)"
+        );
         return;
       } else if (loginResult === "error") {
         setState({ ...state, btn: "Login" });