Add dev.to link to footer (#1003)

* Add DEV Community (dev.to) link to footer

Add to the channels section of footer alongside similar resources

* Add DEV Community to support page

content/community/support.md

@@ -19,6 +19,10 @@ For longer-form conversations about React, we've set up a [discussion forum at *
 
 In the forum there's also a category for job posts and a category for discussion of our weekly meeting notes.
 
+## DEV Community
+
+[DEV's React tag](https://dev.to/t/react) is a place to share React projects, articles and tutorials as well as start discussions and ask for feedback on React-related topics. Developers of all skill-levels are welcome to take part.
+
 ## React Community on Hashnode
 
 [Hashnode's React community](https://hashnode.com/n/reactjs) is a great place to stay up-to-date with React discussion, news and stories.

src/components/LayoutFooter/Footer.js

@@ -98,6 +98,12 @@ const Footer = ({layoutHasSidebar = false}: {layoutHasSidebar: boolean}) => (
               rel="noopener">
               Reactiflux Chat
             </ExternalFooterLink>
+            <ExternalFooterLink
+              href="https://dev.to/t/react"
+              target="_blank"
+              rel="noopener">
+              DEV Community
+            </ExternalFooterLink>
             <ExternalFooterLink
               href="https://www.facebook.com/react"
               target="_blank"