In the days of the Covid-19 lockdown in Ho Chi Minh, Vietnam. I have been working from home for the past 2 months. In my free time, I share how to create a status statistics page, although it seems quite new or there are paid packages with great features, but for personal needs I choose free services.
You can see my site demo at http://status.eplus.dev
In order to have your status page available under your own subdomain,
you need to create a CNAME record from your subdomain to xxxx.status.updown.io
(xxxx being your check token, visible in your status page URL).
For example, in order to direct https://status.example.com to https://updown.io/2yy9,
you need to create a CNAME entry status.example.com pointing to 2yy9.status.updown.io.
An SSL certificate will automatically be generated for your custom domains.
Also, your status page must be PUBLIC, otherwise you'll get a 404.