Prompt about enabling auth providers when creating new app

packages/create-app/src/createApp.ts

@@ -148,6 +148,10 @@ export default async (cmd: Command): Promise<void> => {
       chalk.green(`🥇  Successfully created ${chalk.cyan(answers.name)}`),
     );
     Task.log();
+    Task.log(
+      'See https://backstage.io/docs/tutorials/quickstart-app-auth to know more about enabling auth providers',
+    );
+    Task.log();
     Task.exit();
   } catch (error) {
     Task.error(error.message);

packages/create-app/templates/default-app/app-config.yaml.hbs

@@ -55,6 +55,7 @@ lighthouse:
   baseUrl: http://localhost:3003
 
 auth:
+  # see https://backstage.io/docs/tutorials/quickstart-app-auth to know more about enabling auth providers
   providers: {}
 
 scaffolder: