bridging in the index

supporting-docs/guides/2016-01-01-index.md

@@ -12,6 +12,7 @@ categories: guides
   <p>If you were using the old v1 CS API, there is also the <a href="/docs/guides/client-server-migrating-from-v1.html">v1 migration guide</a> which justs lists the changes from v1 to r0.</p>
   <p><a href="./lets-encrypt.html">Let's Encrypt Matrix</a> explains how to use Let's Encrypt's certificates with your Synapse installation. This guide was written by William A Stevens.</p>
   <p>The <a href="./application_services.html" title="Application services">Application services</a> guide introduces and explains Application services, and what they can be used for.</p>
+  <p><a href="./types-of-bridging.html">Types of Bridging</a> should be read by all bridge developers to ensure everyone has the same mental map of terminology when implementing bridges.</p>
   <p>The <a href="./e2e_implementation.html">End-to-end Encryption Implementation Guide</a> is intended for client developers who wish to add support for end-to-end encryption.</p>
 
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