OpenSourceSDRLab 下载中心测试文件 / Download center test file

这是一个测试文件，用来确认下载站可以正常列目录和下载。
This file only checks that the download site can list and serve files.

正式固件和镜像放进「公开下载」后，可以删掉这个「测试」目录。
Delete this "测试" folder once real firmware and images are published.