Determines if mongoose connection is good

databaseHealth.js

// As stated before "readyState" is good. "ping" is also good admin utility for doing so as well. 
// It will return { ok: 1 } if it can accept commands.

const mongoose = require('mongoose');

// Create the database connection.
const connection = await mongoose.createConnection(
    CONNECT_URI,
    CONNECT_OPTS
);

const connectionIsUp = async () => {
    try {
        const adminUtil = connection.db.admin();
        const result = await adminUtil.ping();
        console.log('result: ', result); // { ok: 1 }
        return !!result?.ok === 1;
    } catch (err) {
        return false;
    }    
};