I've personally set this kind of thing up. Inherited an old PHP site for a webdev contract, and a couple weeks into development (before any of my code had made

I've personally set this kind of thing up. Inherited an old PHP site for a webdev contract, and a couple weeks into development (before any of my code had made it to prod), the server starts hanging randomly, or spitting out seemingly random errors on every request. I was told in no uncertain terms by the client that I had to fix the server hangs within 48hrs I'd lose the contract. This was in a million+ LOC custom Wordpress nightmare. I wound up writing a script that ran on a little EC2.micro instance that would ping the homepage every 60s looking for the HTML comment `<!-- if you delete this comment, the server will reboot forever -->`, and if the request timed out or the text wasn't found it would hit their hosting API and reboot the server the site was running on. I deployed the "fix", finished the contract without incident, and subsequently fired the client.