adding badge for Discord fixes #764 (#771)
adding badge for Discord fixes #764 (#771)

* adding badge

* Update getting-started.md

Co-authored-by: Evan Jacobs <2029219c5415bf0e49d9d2ed80e76d8d7811f03e@users.noreply.github.com>
styled-components/styled-components-website,styled-components/styled-components-website