Prometheus

app := fiber.New(fiber.Config{})
  
prometheusHandler := fasthttpadaptor.NewFastHTTPHandler(
    promhttp.HandlerFor(
        prometheus.DefaultGatherer,
        promhttp.HandlerOpts{
            _// Opt into OpenMetrics to support exemplars.
_            EnableOpenMetrics: true,
        },
    ),
)

app.Get("/metrics", func(c *fiber.Ctx) error {
    _// recordMetrics()
_    fmt.Println("Hello World")
    prometheusHandler(c.Context())
    return nil
})