add live reloading to the client

template/components/_head.hbs

@@ -17,6 +17,12 @@ clever to do while browser vendors figure that out, we'll just have to do a cach
 --}}
 <script type="importmap">{{{ import_map }}}</script>
 
+{{#if dev}}
+<script type="module">
+    import "treehouse/live-reload.js";
+</script>
+{{/if}}
+
 <script>
     const TREEHOUSE_SITE = `{{ config.site }}`;