Feedback:
https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/8620#note_22868713

Feedback:
https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/8620#note_21590440

Feedback:
https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/8620#note_22020035

Feedback:
https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/8620#note_22021001

* upstream/master: (574 commits)
  remove dateFormat global exception
  fix relative paths to xterm.js within fit.js
  use setFixtures instead of fixture.set
  prevent u2f tests from triggering a form submission while testing
  simplify test for focus state
  preload projects.json fixture
  preload projects.json fixture
  rework tests which rely on teaspoon-specific behavior
  Only render hr when user can't archive project.
  use setFixtures instead of fixture.set
  ensure helper classes and constants are exposed globally
  preload projects.json fixture
  fix fixture references in environments_spec
  allow console.xxx in tests, reorder eslint rules alphabetically
  remove redundant "data-toggle" attribute so Vue doesn't complain
  fix broken reference to formatDate in a CommonJS environment
  fix errors within gl_dropdown_spec.js when running in Karma
  fix intermittant errors in merge_commit_message_toggle_spec.rb
  Update installation docs to include Docker, others
  ignore node_modules in rubocop
  ...

Update installation docs to include Docker, others

See merge request !8943

Don't execute git hooks if you create branch as part of other change

Closes #23439

See merge request !7237

Backport frontend test fixes from webpack branch

See merge request !8945

Ignore node_modules in rubocop

See merge request !8942

Don't require lib/gitlab/request_profiler/middleware.rb in config/initializers/request_profiler.rb

Closes #20452

See merge request !8927

Resolve "Comment button doesn't align vertically with line number"

Closes #26859

See merge request !8918

Resolve "Comment button doesn't align vertically with line number"

Closes #26859

See merge request !8918

Fix Ruby verification command

See merge request !8938

Resolve "Double separator line in Edit projects settings"

Closes #27321

See merge request !8917

Simplify the SSH protocol introduction and link to a DO tutorial

See merge request !8901

As per this comment
https://gitlab.com/gitlab-com/support/issues/374#note_22056587 we're
moving documentation around from the support workflows.

Fix wrong call to ProjectCacheWorker.perform, and call ProjectCacheWorker.perform_async instead

Closes #27516

See merge request !8910

Fixed group label in issuable sidebar

Closes #27253

See merge request !8924

unifies mr diff file button style

Closes #27291

See merge request !8874

Fix filtered search manager spec teaspoon error

See merge request !8919