[ MongoDB ] MongoDB update : useUnifiedTopology: true

[MONGODB DRIVER] Warning: Current Server Discovery and Monitoring engine is deprecated, and will be removed in a future version. To use the new Server Discover and Monitoring engine, pass option { useUnifiedTopology: true } to the MongoClient constructor.

https://stackoverflow.com/questions/57895175/server-discovery-and-monitoring-engine-is-deprecated

Server Discovery And Monitoring engine is deprecated

Mongoose 5.7.1 버전 useUnifiedTopology: true 옵션 추가됨

mongoose.connect(mongoConnectionString, {useNewUrlParser: true, useUnifiedTopology: true});