docs(add-to-existing): add a note specifying how the existing apps were started

Author: brandyscarney

docs/angular/add-to-existing.md

@@ -24,6 +24,12 @@ This guide uses `.css` file extensions for stylesheets. If you created your Angu
 
 ## Setup
 
+:::info
+
+This guide follows the structure of an Angular app created with the Angular CLI. If you started your Angular app using a different method, your file structure and setup may differ.
+
+:::
+
 You can add Ionic Angular to your existing Angular project using the Angular CLI's `ng add` feature or by installing it manually.
 
 ### Using ng add

docs/react/add-to-existing.md

@@ -24,6 +24,12 @@ This guide uses TypeScript examples. If you're using JavaScript, the setup proce
 
 ## Setup
 
+:::info
+
+This guide follows the structure of a React app created with Vite. If you started your React app using a different tool (such as Create React App), your file structure and setup may differ.
+
+:::
+
 Follow these steps to add Ionic React to your existing React project:
 
 #### 1. Install the Package

docs/vue/add-to-existing.md

@@ -24,6 +24,12 @@ This guide uses JavaScript examples. If you're using TypeScript, the setup proce
 
 ## Setup
 
+:::info
+
+This guide follows the structure of a Vue app created with `create-vue` (which uses Vite). If you started your Vue app using a different tool (such as Vue CLI), your file structure and setup may differ.
+
+:::
+
 Follow these steps to add Ionic Vue to your existing Vue project:
 
 #### 1. Install the Packages

versioned_docs/version-v7/react/add-to-existing.md

@@ -24,6 +24,12 @@ This guide uses TypeScript examples. If you're using JavaScript, the setup proce
 
 ## Setup
 
+:::info
+
+This guide follows the structure of a React app created with Vite. If you started your React app using a different tool (such as Create React App), your file structure and setup may differ.
+
+:::
+
 Follow these steps to add Ionic React to your existing React project:
 
 #### 1. Install the Package