fix: move middleware to handlers, as it belongs there

handler/middleware/wrapper.go

@@ -0,0 +1,13 @@
+package middleware
+
+import "net/http"
+
+func Wrapper(next http.Handler, handlers ...func(http.Handler) http.Handler) http.Handler {
+	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		lastHandler := next
+		for i := len(handlers) - 1; i >= 0; i-- {
+			lastHandler = handlers[i](lastHandler)
+		}
+		lastHandler.ServeHTTP(w, r)
+	})
+}