https://docs.docker.com/compose/install/
$ cd gitbucket
$ cp .env.template .env
$ vi .env # Edit
$ source set_environments .env
$ cd gitbucket
$ docker-compose build
$ cd gitbucket
$ docker-compose up -d
$ cd gitbucket
$ ./backup.sh # backup to gitbucket/backup/home.tar.gz
$ ./backup.sh -r # restore from gitbucket/backup/home.tar.gz