GitLab Next

- Also makes other minor Markdown fixes that were near the main fixes.

This adds `project:, file:, ref:` specification support.

Also:

- Slight restructure.
- Some Markdown improvements.

Also fixes spelling, and makes the Markdown style more consistent.

Document importing of CSVs with format information and sample data

Cross link from GitLab CI variable doc too

Add note about running pods and updating secrets without any code change

These are data columns that store runtime configuration
of build needed to execute it on runner and within pipeline.

The definition of this data is that once used, and when no longer
needed (due to retry capability) they can be freely removed.

They use `jsonb` on PostgreSQL, and `text` on MySQL (due to lacking
support for json datatype on old enough version).

This rewrites a syntax to allow include of templates.
This also normalises the syntax used by include: feature

Closes https://gitlab.com/gitlab-org/gitlab-ce/issues/45279

Replace all '9koXpg98eAheJpvBs5tK' occurrences with
'<your_access_token>' in API docs.

Make correction to URL, from https://about.gitab.com/handbook/documentation/ to https://about.gitlab.com/handbook/documentation/ (I searched to see if this is a duplicate of an existing fix, didn't find one)

Webhook URLs were recently encrypted in the database via
https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/21645, and as a
result they are no longer exported. When an exported project with
Webhooks is imported, the project import service will fail with
`URI::InvalidURIError: bad URI(is not URI?)` due to a blank URL.
We avoid this by disabling the export/import of Webhooks in
the first place.

Closes https://gitlab.com/gitlab-org/gitlab-ce/issues/53513

Signed-off-by: Takuya Noguchi <takninnovationresearch@gmail.com>

Signed-off-by: Takuya Noguchi <takninnovationresearch@gmail.com>

Signed-off-by: Takuya Noguchi <takninnovationresearch@gmail.com>

bundler gem has been included in the Docker official Ruby image since 2.1.
Signed-off-by: Takuya Noguchi <takninnovationresearch@gmail.com>