Connect to Mongoose Database
const mongoose = require('mongoose');

const db = mongoose.connection;

mongoose.connect("mongodb://localhost:27017/appname");

db.on('open', () => {
    console.log('Connected to mongoDB');
});

db.on('error', (error) => {
    console.log(error);
});
Mongoose Schema

Basic Schema

const mongoose = require('mongoose');
const Schema = mongoose.Schema;

const userSchema = new Schema({
    name: { type: String, required: true, max: 100 },
    email: { type: String, required: false, max: 100, default: null },
});

module.exports = mongoose.model('user', userSchema);