add table of contents to contact page

static/contact.html

@@ -46,6 +46,16 @@
         <main id="contact">
             <h1><a href="#contact">Contact</a></h1>
 
+            <nav id="table-of-contents">
+                <h2><a href="#table-of-contents">Table of contents</a></h2>
+
+                <ul>
+                    <li><a href="#community">Community</a></li>
+                    <li><a href="#contacting-the-project">Contacting the project</a></li>
+                    <li><a href="#reporting-issues">Reporting issues</a></li>
+                </ul>
+            </nav>
+
             <section id="community">
                 <h2><a href="#community">Community</a></h2>