Predefined-environment-variables-reference
https://docs.gitlab.com/ee/ci/variables/predefined_variables.html

Pipeline-schedules
https://docs.gitlab.com/ee/user/project/pipelines/schedules.html

Cache-vs-artifacts
https://docs.gitlab.com/ee/ci/caching/#cache-vs-artifacts

Deployment-Environments
https://docs.gitlab.com/ee/ci/environments/

allow-failure
https://docs.gitlab.com/ee/ci/yaml/#allow_failure

when-manual
https://docs.gitlab.com/ee/ci/yaml/#whenmanual

Gitflow-Workflow
https://www.atlassian.com/git/tutorials/comparing-workflows/gitflow-workflow

only-except
https://docs.gitlab.com/ee/ci/yaml/#onlyexcept-basic

Configuring-dynamic-environments
https://docs.gitlab.com/ee/ci/environments.html#configuring-dynamic-environments

Surge-Tearing-down-a-published-project
https://surge.sh/help/tearing-down-a-project

Gitlab-CI-Documentation-before-script-and-after-script
https://docs.gitlab.com/ee/ci/yaml/#before_script-and-after_script