Created as a way to monitor servers that are not pingable to Uptime Kuma instance using push type monitor. (There would have been a better way to do this but wanted to do something in rust so did this)
HEARTBEAT_URL URL that the application uses for a get request
HEARTBEAT_INTERVAL Interval in millis on which the application sends the requests
HEARTBEAT_URL="https://example.com/heartbeat"
HEARTBEAT_INTERVAL=10000