# US West Coast mirror
curl https://mirror.xtom.com/sb/nginx/public.key | apt-key add -
echo "deb http://mirror.xtom.com/sb/nginx stretch main" > /etc/apt/sources.list.d/sb-nginx.list

# Hongkong mirror
curl https://mirror.xtom.com.hk/sb/nginx/public.key | apt-key add -
echo "deb http://mirror.xtom.com.hk/sb/nginx stretch main" > /etc/apt/sources.list.d/sb-nginx.list