AWS Lambda handler for checking expiration date of SSL certificates

handler.js

const fs = require('fs');
const axios = require('axios');
const checkCertExpiration = require('check-cert-expiration');
const twilioClient = require('twilio')(accountSid, authToken);

const accountSid = process.env.TWILIO_ACCOUNT_SID // Your Account SID from www.twilio.com/console
const authToken = process.env.TWILIO_AUTH_TOKEN // Your Auth Token from www.twilio.com/console
const phoneNumber = process.env.MOBILE_NUMBER_SMS // Phonenumber to send SMS to
const ourNumber = process.env.TWILIO_OUR_NUMBER // Phonenumber to send SMS from
const endpointChatUrl = process.env.ROCKET_LOG_URL // RocketChat webhook URL for sending messages to chat
const daysNotify = process.env.DAYS_NOTIFY_BEFORE_EXPIRE // Days to notify before SSL expires and sent as chat message
const daysNotifySMS = process.env.DAYS_NOTIFY_BEFORE_EXPIRE_SMS // Days to notify before SSL expires and sent as SMS

const sentSMS = async (logMessage) =>  {
    try {

        await twilioClient.messages.create({
            body: `${logMessage}`,
            from: ourNumber,
            to: phoneNumber
        });
    } catch (err) {
        console.log(err);
    }
}

//check if ssl is about to expire
const checkSSL = async (domain) => {
    try {
        const { daysLeft, host, port } = await checkCertExpiration(domain);

        let logMessage = `${daysLeft} days until the certificate expires for ${host}`;

        if(daysLeft < daysNotifySMS){
            console.log(logMessage);

            await sentSMS(logMessage);
            await axios.get(`${endpointChatUrl}${logMessage}`);

        }else if(daysLeft <= daysNotify){
            console.log(`${logMessage}`);
            await axios.get(`${endpointChatUrl}${logMessage}`);
        }
        
    } catch (err) {
        console.error(`${domain}: ${err.name}:${err.message}`);
    }
}

const checkAllDomains = async () => {
    // get domains from domains
    const domains = fs.readFileSync('./domains', 'utf8').split('\n');

    for (let i = 0; i < domains.length; i++) {
        const domain = domains[i];
        await checkSSL(domain);
    }
}

async function testLocal(){
    await checkAllDomains();
}

exports.handler = async function(event, context, callback) {
    await checkAllDomains();
}