Clarify artifact expiry
## What does this MR do?
Clarifies documentation about artifact expiry.
## Are there points in the code the reviewer needs to double check?
## Why was this MR needed?
## What are the relevant issue numbers?
## Screenshots (if relevant)
See merge request !4831
Signed-off-by: Rémy Coutable <remy@rymai.me>
Document `GIT_STRATEGY` and `GIT_DEPTH`
## What does this MR do?
Documents `GIT_STRATEGY` and `GIT_DEPTH`. Also fixes the TOC since the anchors weren't working.
## Are there points in the code the reviewer needs to double check?
The TOC and the location of the new entries.
## Why was this MR needed?
## What are the relevant issue numbers?
https://gitlab.com/gitlab-org/gitlab-ci-multi-runner/merge_requests/188
## Screenshots (if relevant)


/cc @axil @ayufan
See merge request !4720
Signed-off-by: Rémy Coutable <remy@rymai.me>
* Adds pipelines page to CI docs.
* Adds image of pipelines list (although currently missing border that is on other images).
* Changes CI to CI/CD in `/doc` and `/doc/ci`
* Sorts user documentation in `/doc`
Partially fixes#17733.
See merge request !4660
Signed-off-by: Rémy Coutable <remy@rymai.me>
Document environments and deployments
## What does this MR do?
Adds an introduction to environments and deployments and tweaks the `environments` entry in `.gitlab-ci.yml` documentation.
## Are there points in the code the reviewer needs to double check?
## Why was this MR needed?
## What are the relevant issue numbers?
Closes#18683.
## Screenshots (if relevant)


/cc @ayufan @axil
See merge request !4725
Grammar tweaks
## What does this MR do?
* Updates grammar in recent CI documentation.
## Are there points in the code the reviewer needs to double check?
## Why was this MR needed?
Because grammar.
## What are the relevant issue numbers?
Needed because of !4200 and !4201.
## Screenshots (if relevant)
See merge request !4772
CI: Add 'triggers' keyword to 'only' and 'except' lists to allow control over when triggers cause builds to run
Currently, the `only` and `except` keywords in `.gitlab-ci.yml` only accept ref names or the special `branches` and `tags` keywords. However, these are primarily useful when controlling how repository activity affects the creation of builds. In my case, instead of building on every commit, I'd like to use the following logic:
- If the repository is tagged, do a build.
- Any other normal commits should not cause a build.
- If a build is triggered via the API, always create one for the specified ref.
From what I can tell, this isn't possible via the existing YAML syntax. In this MR, I introduce a new keyword `triggers` that goes along with `branches` and `tags`. I can implement the logic above using the following job configuration:
```yaml
only:
- tags
- triggers
```
I updated the tests and documentation to reflect this and everything seems to pass.
See merge request !3230
- Added notice about build artifacts not beeing collected on failed builds.
- Removed "introduced in 0.7.0" for artifacts section.
- Made windows notice more precise