server: implement local file management

server/api/response.go

@@ -37,3 +37,15 @@ func NewChannelListResponse(channels []*Channel) []render.Renderer {
 func (c *ChannelPayload) Render(w http.ResponseWriter, r *http.Request) error {
 	return nil
 }
+
+type FilePayload struct {
+	*File
+}
+
+func NewFilePayloadResponse(file *File) *FilePayload {
+	return &FilePayload{File: file}
+}
+
+func (f *FilePayload) Render(w http.ResponseWriter, r *http.Request) error {
+	return nil
+}