merge: merge컨플릭트 해결

app.js

controllers/chatController.js

middlewares/auth.js

models/index.js

passport/googleStrategy.js

routes/authRoute.js

routes/chatRoute.js

routes/friendRoute.js

routes/inviteRoute.js

routes/scheduleRoute.js

routes/sessionRoute.js

schemas/chatRooms.js

services/chatService.js

wsServer.js