Add docs link in nav bar

src/pages/docs.html

@@ -20,7 +20,7 @@
 
   <h3>Install the SDK</h3>
   <p>Then you need to include the Userbase SDK into your web app.</p>
-  <p>You can either include the SDK with a &lt;script&gt; tag:</p>
+  <p>You can either include the SDK with a <code class="language-markup">&lt;script&gt;</code> tag:</p>
 
   <pre>
     <code class="language-markup"><!--

src/template.html

@@ -24,6 +24,7 @@
         </div>
       </div>
       <nav class="pt-2 pb-4 hidden sm:flex sm:p-0 text-lg text-center menu">
+        <a href="/docs" class="menu-item">Docs</a>
         <a href="/mailing-list" class="menu-item">Mailing list</a>
         <a href="mailto:daniel@encrypted.dev" class="menu-item">Contact</a>
       </nav>