编辑 nginx/conf/nginx.conf，添加以下代码即可。
http {
gzip on;
gzip_min_length 1024;
gzip_buffers 4 8k;
gzip_comp_level 6;
gzip_types text/plain text/css application/json application/javascript application/x-javascript text/xml application/xml application/xml+rss text/javascript;
gzip_vary on;
}