Added architecture info
What does this MR do?
This adds information about available architectures.
See this note for details: gitlab-com/www-gitlab-com!55757 (comment 377512668)
Moving docs to a new location?
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Make sure the old link is not removed and has its contents replaced with a link to the new location. -
Make sure internal links pointing to the document in question are not broken. -
Search and replace any links referring to old docs in GitLab Runner's source code
Edited by Georgi N. Georgiev