GitLab

1. Projects, groups, and namespaces

   Organizing code in projects and groups and project settings.

2. Roles and permissions

   Guest, Reporter, Developer, Maintainer, and Owner roles and access.

3. Merge requests

   Code review, approvals, merge methods, and pipelines in merge requests.

4. Protected branches

   Branch protection rules, push and merge access.

5. Issues and planning

   Issues, epics, labels, milestones, iterations, and boards.

6. CI/CD pipelines

   Pipeline, stage, and job structure and pipeline types.

7. .gitlab-ci.yml keyword reference

   Jobs, stages, rules, needs, artifacts, cache, and includes in CI configuration.

8. GitLab Runner

   Shared, group, and project runners, executors, and tags.

9. CI/CD variables and secrets

   Predefined and custom variables, masking, protection, and secrets integration.

10. Environments and deployments

    Deployments, review apps, and deployment approvals.

11. Application security

    SAST, DAST, dependency and container scanning, and secret detection.

12. Container and package registries

    Storing images and packages in GitLab.

13. REST API

    API authentication with tokens, pagination, and usage.

14. Administration and self-managed

    Installing, configuring, and operating self-managed GitLab instances.

Each section links to the official page. Titles and summaries by Extra Credit; the docs belong to their authors.

Source: endoflife.date