add settings page

index.html

@@ -27,6 +27,7 @@
 			<nav>
 				<a href="index.html" aria-current="true">Instances</a>
 				<a href="account.html">Account</a>
+				<a href="settings.html">Settings</a>
 				<a href="login.html">Logout</a>
 			</nav>
 		</header>