nginx配置gzip，压缩css，不压缩js

gzip on;

gzip_min_length 1k;

gzip_buffers 16 64k;

gzip_http_version 1.1;

gzip_comp_level 9;

gzip_types text/plain application/x-Javascript text/css application/xml text/Javascript application/x-httpd-php image/jpeg image/gif image/png;

gzip_vary on;