Update webpack on-demand compiler placeholder message

app/assets/javascripts/webpack_non_compiled_placeholder.js

@@ -8,7 +8,7 @@ Object.assign(div.style, {
   left: 0,
   'z-index': 100000,
   background: 'rgba(0,0,0,0.9)',
-  'font-size': '25px',
+  'font-size': '20px',
   'font-family': 'monospace',
   color: 'white',
   padding: '2.5em',
@@ -16,9 +16,24 @@ Object.assign(div.style, {
 });
 
 div.innerHTML = `
-<h1 style="color:white">🧙 Webpack is doing its magic 🧙</h1>
-<p>If you use Hot Module reloading, the page will reload in a few seconds.</p>
-<p>If you do not use Hot Module reloading, please <a href="">reload the page manually in a few seconds</a></p>
+<!-- https://github.com/webpack/media/blob/master/logo/icon-square-big.svg -->
+<svg height="50" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1200 1200">
+  <title>webpack logo</title>
+  <path fill="#FFF" d="M600 0l530.3 300v600L600 1200 69.7 900V300z"/>
+  <path fill="#8ED6FB" class="st1" d="M1035.6 879.3l-418.1 236.5V931.6L878 788.3l157.6 91zm28.6-25.9V358.8l-153 88.3V765l153 88.4zm-901.5 25.9l418.1 236.5V931.6L320.3 788.3l-157.6 91zm-28.6-25.9V358.8l153 88.3V765l-153 88.4zM152 326.8L580.8 84.2v178.1L306.1 413.4l-2.1 1.2-152-87.8zm894.3 0L617.5 84.2v178.1l274.7 151.1 2.1 1.2 152-87.8z"/>
+  <path fill="#1C78C0" d="M580.8 889.7l-257-141.3v-280l257 148.4v272.9zm36.7 0l257-141.3v-280l-257 148.4v272.9zm-18.3-283.6zM341.2 436l258-141.9 258 141.9-258 149-258-149z"/>
+</svg>
+
+<h1 style="color:white">✨ webpack is compiling frontend assets ✨</h1>
+<p>
+  To reduce GDK memory consumption, incremental on-demand compiling is on by default.<br />
+  You can disable this within gdk.yml.
+  Learn more <a href="https://gitlab.com/gitlab-org/gitlab-development-kit/-/blob/main/doc/configuration.md#webpack-settings">here</a>.
+</p>
+<p>
+  If you have live_reload enabled, the page will reload automatically when complete.<br />
+  Otherwise, please <a href="">reload the page manually in a few seconds</a>
+</p>
 `;
 
 document.body.append(div);