docs: Remove UI components for now, we will use Storybook instead later. Clean up links and introduction. (#2520)

extensions/default/src/ViewerLayout/index.jsx

@@ -101,11 +101,14 @@ function ViewerLayout({
   const { show, hide } = useModal();
 
   const { hotkeyDefinitions, hotkeyDefaults } = hotkeysManager;
+  const versionNumber = process.env.VERSION_NUMBER;
+  const buildNumber = process.env.BUILD_NUM;
+
   const menuOptions = [
     {
       title: t('Header:About'),
       icon: 'info',
-      onClick: () => show({ content: AboutModal, title: 'About OHIF Viewer' }),
+      onClick: () => show({ content: AboutModal, title: 'About OHIF Viewer', contentProps: { versionNumber, buildNumber } }),
     },
     {
       title: t('Header:Preferences'),