Document stages and jobs.

docs/gitlab/drupal/index.md

@@ -405,8 +405,27 @@ Here we have some internal stages, which cannot be executed alone. The purpose i
 collect repeating execution.
 
 #### .prepareaccess
+
+This internal job, you find in [mixins.yml](https://gitlab.lakedrops.com/gitlab-ci-cd/general/-/blob/main/mixins.yml?ref_type=heads).
+
+Mainly, we care about getting access to:
+
+- the host `${CI_SERVER_HOST}` with `ssh` via `$SSH_PRIVATE_KEY`
+- GitLab Login via `$GITLAB_ACCESS_TOKEN` and `$GITLAB_PRIVATE_TOKEN`
+- Docker configuration via `$DOCKER_AUTH_CONFIG`
+
+
 #### .preparecomposerplugins
 
+This internal job, you find in [mixins.yml](https://gitlab.lakedrops.com/gitlab-ci-cd/general/-/blob/main/mixins.yml?ref_type=heads).
+
+The following points will be prepared for [Composer](https://getcomposer.org/):
+
+- the version >2, if `$DOWNGRADE_COMPOSER` is not set
+- the configuration `allow-plugins`
+- the configuration `audit.abandoned`, depend on `$IGNORE_COMPOSER_ABANDONED_AUDIT`
+- unsupported module versions, which are allowed to use
+
 ## Configuration
 
 ### GitLab Runner