Merge branch 'master' into nav-sorting

.github/release-drafter.yml

Dockerfile

README.md

_config.yml

_includes/fix_linenos.html

_includes/head.html

_includes/vendor/anchor_headings.html

_layouts/default.html

_sass/code.scss

_sass/content.scss

_sass/navigation.scss

_sass/support/_variables.scss

_sass/support/mixins/_typography.scss

_sass/typography.scss

assets/js/zzzz-search-data.json

docker-compose.yml

docs/configuration.md

docs/index-test.md

docs/ui-components/code.md

docs/ui-components/linenos.md