code: @GetMapping("/logo/{name}.{extension}")
    public void getLogo(
        OutputStream out,
        @PathVariable("name") String name,
        @PathVariable("extension") String extension,
        HttpServletResponse response)
        throws IOException {
      File f = fileStore.getFileUnchecked("/logo/" + name + "." + extension);
      if (!f.exists()) {
        response.sendError(HttpServletResponse.SC_NOT_FOUND);
        return;
      }
  
      // Try to get contenttype from file
      String contentType = URLConnection.guessContentTypeFromName(f.getName());
      if (contentType != null) {
        response.setContentType(contentType);
      }
  
      FileCopyUtils.copy(new FileInputStream(f), out);
    }
docs: Get a file from the logo subdirectory of the filestore