Add healthcheck endpoint

Author: alufers

main.go

@@ -102,6 +102,7 @@ func main() {
 	app.Post("/api/v1/control-relay", AuthMiddleware, handleControlRelay)
 	app.Get("/api/v1/spaceapi", handleSpaceAPI)
 	app.Get("/api/v1/branding", handleBranding)
+	app.Get("/health", handleHealth)
 	app.Get("/api/v1/device-history", handleDeviceHistory)
 	app.Get("/api/v1/stats/usage-heatmap", handleUsageHeatmap)
 
@@ -217,3 +218,7 @@ func handleBranding(c *fiber.Ctx) error {
 	cfg := MustLoadConfig()
 	return c.JSON(cfg.Branding)
 }
+
+func handleHealth(c *fiber.Ctx) error {
+	return c.SendString("OK")
+}