This is a simple Node.js server script that will, on a schedule you set, scrape a web URL for one or more strings you specify. If any of the search strings are found, it will send an email notification using Mailgun.
To get started, copy example.config.js to config.js and update the parameters. The various options are documented in the config file.
Please be courteous with the frequency at which you send requests to servers you do not own.