Update frontend developer documentation

Change-Id: I1d8c36b5150605fc82bf466a52e3a727e3c8385b

Documentation/dev-community.txt

diff --git a/Documentation/dev-community.txt b/Documentation/dev-community.txt
index c9784ae..b9036b8 100644
--- a/Documentation/dev-community.txt
+++ b/Documentation/dev-community.txt
@@ -31,6 +31,7 @@
 * link:dev-cla.html[Contributor License Agreement]
 * link:dev-contributing.html[Contributing to Gerrit]
 * link:dev-readme.html[Developer Setup]
+* link:dev-frontend-readme.html[Polymer Frontend Developer Setup]
 * link:dev-crafting-changes.html[Crafting Changes]
 * link:dev-starter-projects.html[Starter Projects]
 
@@ -54,4 +55,4 @@
 Part of link:index.html[Gerrit Code Review]
 
 SEARCHBOX
----------
\ No newline at end of file
+---------