Integrate a heartbeat HTTP GET endpoint to ensure free Koyeb instance active 24/7

[wedontdozero]

Free koyeb instance sleeps after an hour of inactivity, causing delayed responses >20s.

Can you please integrate a heartbeat HTTP GET endpoint that uptimerobot can ping to keep the instance active 24/7?

[yym68686]

Okay, I'll look into how to implement this feature later.