https://home.console.aliyun.com/
https://jp.aliyun.com/campaign/coupon-freetrial
# yum install -y yum-utils
# yum-config-manager --add-repo https://download.docker.com/linux/centos/docker-ce.repo
# yum makecache fast
# yum -y install docker-ce
# systemctl start docker
# mkdir /var/handson
# echo "Docker Hands-on!! " > /var/handson/index.html
# docker run -d -v /var/handson:/usr/local/apache2/htdocs -p 80:80 httpd
# docker ps
# yum install -y git
# git clone https://github.com/gsi-cyberjapan/gsimaps.git /var/handson2
# docker run -d -v /var/handson2:/usr/local/apache2/htdocs -p 80:80 httpd
# docker ps