add base setup as well as catalog for gitea

packages/app/src/App.tsx

@@ -27,15 +27,35 @@ import { entityPage } from './components/catalog/EntityPage';
 import { searchPage } from './components/search/SearchPage';
 import { Root } from './components/Root';
 
-import { AlertDisplay, OAuthRequestDialog } from '@backstage/core-components';
+import {
+  AlertDisplay,
+  OAuthRequestDialog,
+  SignInPage,
+} from '@backstage/core-components';
 import { createApp } from '@backstage/app-defaults';
 import { FlatRoutes } from '@backstage/core-app-api';
 import { CatalogGraphPage } from '@backstage/plugin-catalog-graph';
 import { PermissionedRoute } from '@backstage/plugin-permission-react';
 import { catalogEntityCreatePermission } from '@backstage/plugin-catalog-common/alpha';
+import { githubAuthApiRef } from '@backstage/core-plugin-api';
+import { CatalogBackendModuleGiteaPage } from '@internal/plugin-catalog-backend-module-gitea';
 
 const app = createApp({
   apis,
+  components: {
+    SignInPage: props => (
+      <SignInPage
+        {...props}
+        auto
+        provider={{
+          id: 'github-auth-provider',
+          title: 'github',
+          message: 'Sign in using GitHub',
+          apiRef: githubAuthApiRef,
+        }}
+      />
+    ),
+  },
   bindRoutes({ bind }) {
     bind(catalogPlugin.externalRoutes, {
       createComponent: scaffolderPlugin.routes.root,
@@ -91,6 +111,7 @@ const routes = (
     </Route>
     <Route path="/settings" element={<UserSettingsPage />} />
     <Route path="/catalog-graph" element={<CatalogGraphPage />} />
+    <Route path="/catalog-backend-module-gitea" element={<CatalogBackendModuleGiteaPage />}/>
   </FlatRoutes>
 );