Frontend Health Check Behaviour

[c-kruse]

I do not think that frontend /api/health it is doing what it was written to do. It appears to return 200 pretty much regardless of what happens with the backend call:

skupper-example-hello-world/frontend/python/main.py

Lines 110 to 114 in 590abaa

	@star.route("/api/health", methods=["GET"])
	async def health(request):
	await send_greeting("Testy Tiger", "Hi")
	return Response("OK\n", 200)

It could be useful for this to return non-okay when the backend service is unavailable for automated test scenarios where we could hook it up to pod readiness or just have a cleaner endpoint to poll.