website: hardcode version banner for 0.1 docs

O.1 docs is deprecated. Let's inform user to switch the the latest version

Signed-off-by: user.email <jf@dagger.io>

website/src/theme/DocPage/index.js

@@ -27,6 +27,7 @@ import {
 } from '@docusaurus/theme-common';
 import Head from '@docusaurus/Head';
 import amplitude from 'amplitude-js';
+import DeprecatedVersionBanner from '../../components/DeprecatedVersionBanner';
 
 function DocPageContent({
   currentDocRoute,
@@ -171,6 +172,9 @@ function DocPage(props) {
             currentDocRoute={currentDocRoute}
             versionMetadata={versionMetadata}
             sidebarName={sidebarName}>
+            {currentDocRoute.sidebar === '0.1' && (
+            <DeprecatedVersionBanner />
+            )}
             <div data-cy="cy-doc-content">
               {renderRoutes(docRoutes, {
                 versionMetadata,