feat: Add instructions for local development and deployment

Updates README.md with clear steps for running the AI Studio app locally, including prerequisites and commands.
Introduces a .env.example file to guide users on API key configuration.
Adds a .gitignore file to prevent unnecessary files from being committed.
Updates asset files (images) with new metadata.

README.md

@@ -1,11 +1,20 @@
 <div align="center">
-
 <img width="1200" height="475" alt="GHBanner" src="https://github.com/user-attachments/assets/0aa67016-6eaf-458a-adb2-6e31a0763ed6" />
-
-  <h1>Built with AI Studio</h2>
-
-  <p>The fastest path from prompt to production with Gemini.</p>
-
-  <a href="https://aistudio.google.com/apps">Start building</a>
-
 </div>
+
+# Run and deploy your AI Studio app
+
+This contains everything you need to run your app locally.
+
+View your app in AI Studio: https://ai.studio/apps/895b5e6f-2f53-4698-8c85-254822f236ac
+
+## Run Locally
+
+**Prerequisites:**  Node.js
+
+
+1. Install dependencies:
+   `npm install`
+2. Set the `GEMINI_API_KEY` in [.env.local](.env.local) to your Gemini API key
+3. Run the app:
+   `npm run dev`