docker-compose: removed `'` characters from `docker-compose.yml`
docker-compose: removed `'` characters from `docker-compose.yml`

sameersbn/docker-gitlab-ci,adiferd/docker-gitlab-ci,sameersbn/docker-gitlab-ci,bboehmke/docker-gitlab-ci,outcoldman/docker-gitlab-ci,adiferd/docker-gitlab-ci,youhong316/docker-gitlab-ci,youhong316/docker-gitlab-ci,outcoldman/docker-gitlab-ci,bboehmke/docker-gitlab-ci