Merge remote-tracking branch 'upstream/v2.9' into merge-branch-v2.9-into-master

docs/content/getting-started/install-traefik.md

docs/content/getting-started/quick-start.md

docs/content/traefik-hub/index.md

...content/user-guides/docker-compose/basic-example/index.md

integration/fixtures/simple_debug_log.toml

integration/simple_test.go