Switch from Webpacker to cssbundling-rails, upgrade Tailwind

app/assets/stylesheets/components/base.css

@@ -0,0 +1,21 @@
+@layer base {
+  body {
+    @apply leading-none
+  }
+
+  h1, h2, h3 {
+    @apply font-light;
+  }
+
+  h1 {
+    @apply text-3xl uppercase;
+  }
+
+  h2 {
+    @apply text-2xl mb-8;
+  }
+
+  h3 {
+    @apply text-xl mb-6;
+  }
+}