[add] better error handling, [add] font selector, [add] tailwind generation

templates/base.html

@@ -6,11 +6,14 @@
 	  content="width=device-width, initial-scale=0.90, user-scalable=no, viewport-fit=cover">
     <meta name="apple-mobile-web-app-capable" content="yes"/>
     <meta name="apple-mobile-web-app-status-bar-style" content="black-translucent"/>
-    <link rel="manifest" href="{{ .RelBase }}./manifest.json" />
     <meta name="theme-color" content="#F3F4F6" media="(prefers-color-scheme: light)">
     <meta name="theme-color" content="#1F2937" media="(prefers-color-scheme: dark)">
-    <script src="https://cdn.tailwindcss.com"></script>
+
     <title>Book Manager - {{block "title" .}}{{end}}</title>
+
+    <link rel="manifest" href="/manifest.json" />
+    <link rel="stylesheet" href="/assets/style.css">
+
     <style>
       /* ----------------------------- */
       /* -------- PWA Styling -------- */