Squashed 'docs/' changes from 316cec249..4eb10c1a9

Squashed 'docs/' changes from 316cec249..4eb10c1a9

4eb10c1a9 Set a sensible maxAge on the image cache
2c37f4f89 Update lists.md
8690c018f Update introduction.md
0458c3d88 Update index.md
150982f5e Update index.md
50dc0b6b9 Update multilingual.md
648598090 Configure image cache to use :cacheDir/images
4dfb523c3 Update introduction.md
b94d42e6f Add text to social images
d3253d2aa Add resources/_gen/images/ to .gitignore
8a56e1dfd Delete resources/_gen/images
1521e79b6 Update introduction.md
c7110a597 Update introduction.md
f7c4d220f Update introduction.md
c14ecf1ff Update introduction.md
c4b388c20 Fix shortcode in hugo-pipes/introduction (#1605)
d9876bd68 Update introduction.md
a39a532d5 Update introduction.md
fa8758122 netlify: Hugo 0.90.1
50cc40570 Update Contribute to Hugo Development
fc98fc82c Add .vscode dir to .gitignore (#1602)
8f8bcdefc Add frontmatter param to code-toggle shortcode (#1601)
f3b432c7c Add markdownlint configuration file (#1597)
7ea3aea92 netlify: Bump to 0.90.0
e2b6f990b docs: Regenerate docs helper
c02259e33 Merge commit '8d9511a08f14260cbfb73119e4afae50e5a9966d'
2e3573899 Add custom font support to images.Text
3186e6458 images: Text filter that draws text with the given options (#9239)
424f219eb tpl/transform: Optional options for highlight func
7993f17d0 Implement XML data support
1eb9d34cf Make resources.Get use a file cache for remote resources
8a0fffd56 Add remote support to resources.Get

git-subtree-dir: docs
git-subtree-split: 4eb10c1a9689aebf652011a6260a14bf8a3dcef4