rename: 원활한 실행위해 파일 소문자로 통일

models/Friend.js

-// models/Friend.js
+//models/friend.js
 
 const { DataTypes } = require('sequelize');
 const sequelize = require('../config/sequelize');

models/Invite.js

 // models/invite.js
+
 const { DataTypes } = require('sequelize');
 const sequelize = require('../config/sequelize');
 

models/meeting.js

-// models/Meeting.js
+// models/meeting.js
 const { DataTypes } = require('sequelize');
 const sequelize = require('../config/sequelize');
 const User = require('./user');

models/schedule.js

-// models/Schedule.js
+// models/schedule.js
 const { DataTypes } = require('sequelize');
 const sequelize = require('../config/sequelize');
 const User = require('./user');

models/user.js

-// models/User.js
+// models/user.js
 
 const { DataTypes } = require('sequelize');
 const sequelize  = require('../config/sequelize');

passport/googleStrategy.js

 // passport/googleStrategy.js
 
 const { Strategy: GoogleStrategy } = require('passport-google-oauth20');
-const User = require('../models/User');
+const User = require('../models/user');
 
 module.exports = new GoogleStrategy(
   {

passport/index.js

 // passport/index.js
 
 const passport = require('passport');
-const User = require('../models/User');
+const User = require('../models/user');
 
 // 직렬화
 passport.serializeUser((user, done) => {