How to add Timestamp in Mongodb Collection using Node.js ?

// Importing mongoose module
const mongoose = require("mongoose");

// Database Address
const url = "mongodb://localhost:27017/GFG";

// Connecting to database
mongoose
  .connect(url)
  .then((ans) => {
    console.log("Connected Successful");
  })
  .catch((err) => {
    console.log("Error in the Connection");
  });

// Calling Schema class
const Schema = mongoose.Schema;

// Creating Structure of the collection
const collection_structure = new Schema({
  name: {
    type: String,
    required: true,
  },
  marks: {
    type: Number,
    min: 10,
    max: 100,
  },
});

// Creating collection
const collections = mongoose.model("GFG2", collection_structure);

// Inserting one document
collections
  .create({

    // Inserting value of only one key
    name: "GFG",
    marks: 1001,
  })
  .then((ans) => {
    console.log(ans);
  })
  .catch((err) => {
    console.log(err.message);
  });