George Kalpakas b596366c67 feat(docs-infra): add maskable PWA icon (#39928)
This commit adds a [maskable PWA icon][1] to ensure it looks good on
different devices/platforms. It also improves the PWA Lighthouse score
(from 96 to 100) by passing the [maskable icon audit][2].

For reference, the maskable icon can be previewed [here][3].

[1]: https://web.dev/maskable-icon/
[2]: https://web.dev/maskable-icon-audit
[3]:
https://maskable.app/?demo=https://user-images.githubusercontent.com/8604205/100861028-f16c9d80-3499-11eb-9341-beba69988cfa.png

PR Close #39928
2020-12-02 11:17:53 -08:00
..