There are many ways to monitor a website, one of which is UptimeRobot. Let’s just put it into practice :

1. Click Register for Free, fill in the data and then click Register now and there will be a confirmation to the  registered email.

2. Open the confirmation email, click clicking here and it will be redirected to the login page.

3. Click Add New Monitor, select the type of monitor you want and fill in the website data and  then click Create Monitor. Don’t forget to check Alert Contacts To Notify to get info via email.

4. There is a feature to view uptime services  , namely Status pages, click Status pages and fill in data and then click Create Public Status Page.

5. Click the + sign  and then click Save and to see the results can click the eye icon under Actions.

Good luck, thank you.