Nginx+fastdfs：
https://www.cnblogs.com/chiangchou/p/fastdfs.html#_label0_1
Thumbnail:
https://blog.csdn.net/wsliangjian/article/details/52529721
Download address:
https://sourceforge.mirrorservice.org/g/gr/graphicsmagick/graphicsmagick/1.3.28/GraphicsMagick-1.3.28.tar.gz