gitlab 官方链接 : https://about.gitlab.com/install/#ubuntu
前提条件 : https://docs.gitlab.com/install/requirements/
sudo apt-get update
sudo apt-get install -y curl openssh-server ca-certificates tzdata perl
sudo apt-get install -y postfix
curl -s https://packages.gitlab.com/install/repositories/gitlab/gitlab-ce/script.deb.sh | sudo bash
sudo EXTERNAL_URL="http://192.168.56.111" apt-get install gitlab-ce