Healthchecks

Healthchecks is an open-source cron job and scheduled-task monitoring service that alerts you when a backup, cron job, or periodic task fails to check in on time — a self-hosted alternative to Cronitor and Dead Man's Snitch. Log in with the SUPERUSER_EMAIL / SUPERUSER_PASSWORD shown in your env vars (update the placeholder email before deploying). After deploy, set SITE_ROOT to your service's public URL and redeploy — it generates the check ping URLs and email links (login and admin work without it, but those links will point at localhost). All data is stored in PostgreSQL, wired via a single DATABASE_URL connection string.

Source: GitHub