Fix smaller performance issues

src/web/templates/user/base.html

@@ -5,6 +5,7 @@
     <meta name="viewport" content="width=device-width, initial-scale=1.0">
     <title>{% block title %}LinkedIn Posts{% endblock %}</title>
     <link rel="icon" type="image/png" href="/static/favicon.png">
+    <link rel="preload" href="/static/tailwind.css" as="style">
     <link rel="stylesheet" href="/static/tailwind.css">
     <style>
         body { background-color: #3d4848; }
@@ -362,5 +363,12 @@
     </script>
 
     {% block scripts %}{% endblock %}
+    <script>
+    if ('serviceWorker' in navigator) {
+        window.addEventListener('load', function() {
+            navigator.serviceWorker.register('/sw.js').catch(function() {});
+        });
+    }
+    </script>
 </body>
 </html>