save() MongooseError: Operation `posts.insertOne()` buffering timed out after 10000ms code example

Example: mongooseerror: operation `users.insertone()` buffering timed out after 10000ms

You need first of all configurate the database connection. There's a link that will help you: https://kb.objectrocket.com/mongo-db/simple-mongoose-and-node-js-example-1007 .

If you have any other doubt let me known.