GitLab CI lint

• GitLab: Install GitLab, Upgrade GitLab Gitlab runner (changelog), gitlab.rb, .gitlab/, gitlab-ci.yml, gitlab-ctl, gitlab-rake, gitlab-backup, gitlab-rails, GitLab editions, GitLab Security Dashboards, GitLab environments, GitLab environment variables, Auto DevOps, permissions, GitLab Pages, gitlab-rails, GitLab scheduled pipelines, GitLab logs, GitLab changelog , GitLab Release CLI, GitLab Omnibus, GitLab Advanced Search, GitLab container registry, GitLab infrastructure registry
• Lint, pylint, eslint, tflint, cfn-lint, autopep8, lint-staged, autopep8 --help, GitLab CI lint, Code climate, Black, hadolint, KubeLinter, hlint, ansible-lint