Add mandarin fonts in Docker .

中文文档

• simple add mandarin fonts .

• use fonts to replace /usr/share/fonts

• check

    docker exec -it nginx /bin/bash
  
    fc-list :lang=zh 
  

  if you find mandarin fonts in the list , then you are success .

• run ./build-image.sh

• run docker-compose up

• the file /pdf/wrongpdf.pdf shows the wrong convert files without mandarin fonts.

• the file /pdf/test.pdf shows the correct convert files with mandarin fonts.