Add customizable notice on main page and in downloads list

app/ui/intro.js

@@ -1,6 +1,17 @@
 const html = require('choo/html');
+const raw = require('choo/html/raw');
 
 module.exports = function intro(state) {
+  const notice = state.WEB_UI.MAIN_NOTICE_HTML
+    ? html`
+        <p
+          class="w-full mt-8 p-2 border-default dark:border-grey-70 rounded-default text-orange-60 bg-yellow-40 text-center leading-normal"
+        >
+          ${raw(state.WEB_UI.MAIN_NOTICE_HTML)}
+        </p>
+      `
+    : '';
+
   return html`
     <send-intro
       class="flex flex-col items-center justify-center bg-white px-6 md:py-0 py-6 mb-0 h-full w-full dark:bg-grey-90"
@@ -12,6 +23,7 @@ module.exports = function intro(state) {
         <p class="max-w-sm leading-loose mt-6 md:mt-2 md:pr-14">
           ${state.translate('introDescription')}
         </p>
+        ${notice}
       </div>
     </send-intro>
   `;