feat: add new telemetry server (#254)

Signed-off-by: Mark Sagi-Kazar <mark.sagikazar@gmail.com>

telemetry/router.go

@@ -0,0 +1,32 @@
+package telemetry
+
+import (
+	"net/http"
+
+	"github.com/go-chi/chi"
+	"github.com/go-chi/chi/middleware"
+	"github.com/go-chi/render"
+
+	"github.com/drakkan/sftpgo/logger"
+	"github.com/drakkan/sftpgo/metrics"
+)
+
+func initializeRouter(enableProfiler bool) {
+	router = chi.NewRouter()
+
+	router.Use(middleware.Recoverer)
+
+	router.Group(func(r chi.Router) {
+		r.Get("/healthz", func(w http.ResponseWriter, r *http.Request) {
+			render.PlainText(w, r, "ok")
+		})
+	})
+
+	metrics.AddMetricsEndpoint(metricsPath, router)
+
+	if enableProfiler {
+		logger.InfoToConsole("enabling the built-in profiler")
+		logger.Info(logSender, "", "enabling the built-in profiler")
+		router.Mount(pprofBasePath, middleware.Profiler())
+	}
+}