Add dev.to link to footer and community page

_includes/footer.html

@@ -32,6 +32,7 @@
                     <li><a href="https://github.com/grpc/" target="_blank"><p class="github community-links">Github</p></a></li>
                     <li><a href="https://twitter.com/grpcio" target="_blank"><p class="twitter community-links">Twitter</p></a></li>
                     <li><a href="https://stackoverflow.com/tags/grpc/" target="_blank"><p class="stack-overflow community-links">Stack Overflow</p></a></li>
+                    <li><a href="https://dev.to/t/grpc" target="_blank"><p class="dev-community community-links">DEV Community</p></a></li>
                     <li><a href="https://www.youtube.com/channel/UCrnk1HWelWnYtF78YZX80fg" target="_blank"><p class="youtube community-links">YouTube</p></a></li>
                 </ul>
             </div>

_sass/modules/_footer.scss

@@ -200,6 +200,10 @@ footer {
   .stack-overflow {
     @include social-icon('../img/icon_stack-overflow.svg');
   }
+
+   .dev-community {
+    @include social-icon('../img/icon_dev-community.svg');
+  }
 
   .youtube {
     @include social-icon('../img/icon_youtube.svg');

community/index.html

@@ -67,6 +67,11 @@ <h4 class="community-reddit community-title">Reddit</h4>
                     <p>Join the <a href="https://www.reddit.com/r/grpc/">subreddit</a></p>
                 </section>
 
+                 <section class="community-section">
+                    <h4 class="community-dev-community community-title">DEV Community</h4>
+                    <p>Follow the <a href="https://dev.to/t/grpc">DEV Tag</a></p>
+                </section>
+
                 <section class="community-section">
                     <h4 class="community-meetings community-title">Community Meetings</h4>
                     <p class="community-text">We hold a community video conference every other week. It's a way to discuss the status of work and show off things the community is working on. Meeting information and notes can be found at <a href="https://bit.ly/grpcmeetings">bit.ly/grpcmeetings</a>.</p>