Return a static resource from the shared folder.

def get_resource(self, request, filename):
        """Return a static resource from the shared folder."""
        filename = join("shared", basename(filename))
        try:
            data = pkgutil.get_data(__package__, filename)
        except OSError:
            data = None
        if data is not None:
            mimetype = mimetypes.guess_type(filename)[0] or "application/octet-stream"
            return Response(data, mimetype=mimetype)
        return Response("Not Found", status=404)