diff --git a/app.js b/app.js
index d4f4514911e40bb27024bab13dcb4d4fae93fc3a..952e375ab1eefe8e4640271668cb1ca136c36754 100644
--- a/app.js
+++ b/app.js
@@ -9,9 +9,13 @@ const { initScheduleCleaner } = require('./utils/scheduler');
 const connectMongoDB = require('./config/mongoose'); // MongoDB 연결
 const { sequelize } = require('./config/sequelize'); // Sequelize 연결
 const cors = require('cors');
+const morgan = require('morgan');
 const syncRdb = require('./sync'); // Import the syncDatabase function
 const app = express();
 
+
+
+app.use(morgan('dev'));  //로깅용
 // CORS 설정
 app.use(
   cors({
@@ -72,14 +76,11 @@ const PORT = process.env.PORT || 3000;
   try {
     // MongoDB 연결
     await connectMongoDB();
-    //console.log('✅ MongoDB 연결 성공');
-    console.log('MongoDB URI:', process.env.MONGO_URI);
     // MySQL 연결 확인
     await syncRdb();
-
     // 서버 시작
     app.listen(PORT, () => {
-      console.log(`Server is running on http://localhost:${PORT}`);
+      console.log(`Server is running on ${PORT}`);
     });
   } catch (error) {
     console.error('❌ 서버 시작 중 오류 발생:', error);
diff --git a/models/Friend.js b/models/Friend.js
index ed0921267e995ac8bf4a85eace2f3b369f13a8db..21ef4aa11e6ccaf7cae9282010296228afe80d15 100644
--- a/models/Friend.js
+++ b/models/Friend.js
@@ -1,4 +1,4 @@
-// models/Friend.js
+// models/friend.js
 
 const { DataTypes } = require('sequelize');
 const sequelize = require('../config/sequelize');
diff --git a/models/Invite.js b/models/Invite.js
index 4eaa66ae9df42413aab2027b589191f8c25ab16b..d4e6105550ab73c611ed17055684c2358645a51c 100644
--- a/models/Invite.js
+++ b/models/Invite.js
@@ -1,4 +1,5 @@
-// models/invite.js
+//models/invite.js
+
 const { DataTypes } = require('sequelize');
 const sequelize = require('../config/sequelize');
 
diff --git a/models/meeting.js b/models/meeting.js
index 8eecaabc74644fdc133dd0e35a1e9d8084fd0314..6ba87388c0db9f04498bcd1618c2d9c6726226a9 100644
--- a/models/meeting.js
+++ b/models/meeting.js
@@ -1,4 +1,4 @@
-// models/Meeting.js
+// models/meeting.js
 const { DataTypes } = require('sequelize');
 const sequelize = require('../config/sequelize');
 const User = require('./user');
diff --git a/models/schedule.js b/models/schedule.js
index 48dcec42477e6681b77928ed3dc84d62963fcb7f..7a07df83917a31e25a0162ab8dca3e5f22cb3d51 100644
--- a/models/schedule.js
+++ b/models/schedule.js
@@ -1,4 +1,4 @@
-// models/Schedule.js
+// models/schedule.js
 const { DataTypes } = require('sequelize');
 const sequelize = require('../config/sequelize');
 const User = require('./user');
diff --git a/models/user.js b/models/user.js
index 7ed604344d59621f069499da5cc892f5594784c9..b7aecfa3ba95422f7157ecb840049441cc545e6f 100644
--- a/models/user.js
+++ b/models/user.js
@@ -1,4 +1,4 @@
-// models/User.js
+// models/user.js
 
 const { DataTypes } = require('sequelize');
 const sequelize  = require('../config/sequelize');
diff --git a/passport/googleStrategy.js b/passport/googleStrategy.js
index c5964eff4a79c6fddcea7b7a9d5cb6b07ea583c4..7acaf173e06eef64c1bf1dc82b22b181154801c6 100644
--- a/passport/googleStrategy.js
+++ b/passport/googleStrategy.js
@@ -1,7 +1,7 @@
 // passport/googleStrategy.js
 
 const { Strategy: GoogleStrategy } = require('passport-google-oauth20');
-const User = require('../models/User');
+const User = require('../models/user');
 
 module.exports = new GoogleStrategy(
   {
diff --git a/passport/index.js b/passport/index.js
index 6f12584b083ce566a93354123eb47740084be6b9..5b6eb76bb69a5f3c3ee3c484c56c225905ef68c3 100644
--- a/passport/index.js
+++ b/passport/index.js
@@ -1,7 +1,7 @@
 // passport/index.js
 
 const passport = require('passport');
-const User = require('../models/User');
+const User = require('../models/user');
 
 // 직렬화
 passport.serializeUser((user, done) => {
diff --git a/schemas/ChatRooms.js b/schemas/ChatRooms.js
index b214fe964f1d7d159b2f63d7ad33e4919964386f..1c2001cfe54dcc6c3034a23e01b3bc706100b94b 100644
--- a/schemas/ChatRooms.js
+++ b/schemas/ChatRooms.js
@@ -1,3 +1,4 @@
+// schemas/chatRooms.js
 const mongoose = require('mongoose');
 
 // MongoDB 채팅방 스키마 수정 (FCM 토큰을 배열로 관리)
diff --git a/sync.js b/sync.js
index 615e5377ebb52c5ac85239c187811c905eb0ec92..84cfdef99fa993f2ee41affb5ea24f99dbb36aa7 100644
--- a/sync.js
+++ b/sync.js
@@ -14,10 +14,6 @@ async function syncRdb() {
     // 모든 모델 동기화
     await sequelize.sync({ force: true });
     console.log('모든 모델이 성공적으로 동기화되었습니다.');
-
-    // 연결 종료
-    await sequelize.close();
-    console.log('Rdb데이터베이스 연결이 종료되었습니다.');
   } catch (error) {
     console.error('Rdb데이터베이스 연결 실패:', error);
   }