[management, reverse proxy] Add reverse proxy feature (#5291)

* implement reverse proxy


---------

Co-authored-by: Alisdair MacLeod <git@alisdairmacleod.co.uk>
Co-authored-by: mlsmaycon <mlsmaycon@gmail.com>
Co-authored-by: Eduard Gert <kontakt@eduardgert.de>
Co-authored-by: Viktor Liu <viktor@netbird.io>
Co-authored-by: Diego Noguês <diego.sure@gmail.com>
Co-authored-by: Diego Noguês <49420+diegocn@users.noreply.github.com>
Co-authored-by: Bethuel Mmbaga <bethuelmbaga12@gmail.com>
Co-authored-by: Zoltan Papp <zoltan.pmail@gmail.com>
Co-authored-by: Ashley Mensah <ashleyamo982@gmail.com>

proxy/internal/accesslog/statuswriter.go

@@ -0,0 +1,26 @@
+package accesslog
+
+import (
+	"net/http"
+)
+
+// statusWriter is a simple wrapper around an http.ResponseWriter
+// that captures the setting of the status code via the WriteHeader
+// function and stores it so that it can be retrieved later.
+type statusWriter struct {
+	w      http.ResponseWriter
+	status int
+}
+
+func (w *statusWriter) Header() http.Header {
+	return w.w.Header()
+}
+
+func (w *statusWriter) Write(data []byte) (int, error) {
+	return w.w.Write(data)
+}
+
+func (w *statusWriter) WriteHeader(status int) {
+	w.status = status
+	w.w.WriteHeader(status)
+}