add base code

filemanager.go

@@ -0,0 +1,16 @@
+package filemanager
+
+import (
+	"net/http"
+
+	"github.com/mholt/caddy/caddyhttp/httpserver"
+)
+
+type FileManager struct {
+	Next httpserver.Handler
+}
+
+func (f FileManager) ServeHTTP(w http.ResponseWriter, r *http.Request) (int, error) {
+
+	return f.Next.ServeHTTP(w, r)
+}