Keep backend warm #131

	name: Keep backend warm

	# Render free-tier web services spin down after ~15 min idle, adding a ~50s cold
	# start to the next request. Ping the health endpoint on a schedule to keep it
	# awake. Free for this repo since it's public (unlimited Actions minutes).
	#
	# Best-effort: GitHub can delay scheduled runs under load, so an occasional cold
	# start may still slip through, and GitHub disables schedules after 60 days of
	# repo inactivity. For guaranteed pings use an external uptime monitor
	# (UptimeRobot, cron-job.org) or a paid Render plan.

	on:
	schedule:
	- cron: "/10 * * *" # every 10 minutes (under Render's ~15-min sleep)
	workflow_dispatch: {} # allow manual runs

	concurrency:
	group: keep-warm
	cancel-in-progress: true

	jobs:
	ping:
	runs-on: ubuntu-24.04
	steps:
	- name: Ping the backend health endpoint
	run: \|
	# The request wakes the instance regardless of status code, so don't
	# fail the job on non-200 (avoids red runs during deploys/brief outages).
	code=$(curl -sS -o /dev/null -w "%{http_code}" --max-time 90 https://metahelper.onrender.com/ \|\| echo "000")
	echo "Health check returned HTTP $code"

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