feat: Add GitHub Codespaces support to Learning project

learning/.devcontainer/devcontainer.json

@@ -0,0 +1,22 @@
+    "customizations": {
+        "vscode": {
+            "extensions": [
+                "dbaeumer.vscode-eslint",
+                "esbenp.prettier-vscode",
+                "bradlc.vscode-tailwindcss"
+            ]
+        }
+    },
+    "forwardPorts": [
+        3000
+    ],
+    "portsAttributes": {
+        "3000": {
+            "label": "Learning App",
+            "onAutoForward": "notify"
+        }
+    },
+    "postCreateCommand": "npm install",
+    "postStartCommand": "if [ ! -f .env.local ]; then cp .env.example .env.local && echo '✅ Created .env.local from .env.example.'; fi && echo '🚀 Ready! Run: npm run dev' && echo '📝 Set GOOGLE_API_KEY in .env.local'",
+    "remoteUser": "node"
+}

learning/.env.example

@@ -0,0 +1,3 @@
+# Google Gemini API Key
+# Get your API key from: https://aistudio.google.com/app/apikey
+GOOGLE_API_KEY=your_api_key_here

learning/.gitignore

@@ -32,6 +32,7 @@ yarn-error.log*
 
 # env files (can opt-in for committing if needed)
 .env*
+!.env.example
 
 # vercel
 .vercel

learning/README.md

@@ -98,9 +98,39 @@ learning/
 └── NOTES.md                     # Detailed design documentation
 ```
 
-## Getting Started
 
-### Prerequisites
+### 🚀 Quick Start with GitHub Codespaces
+
+The fastest way to get started is using GitHub Codespaces - no local setup required!
+
+[![Open in GitHub Codespaces](https://github.com/codespaces/badge.svg)](https://codespaces.new/google-gemini/workshops)
+
+1. **Open in Codespaces**
+   - Navigate to the [workshops repository](https://github.com/google-gemini/workshops)
+   - Click **Code** → **Codespaces** → **Create codespace on main**
+   - Wait for the environment to initialize (~2-3 minutes)
+
+2. **Set up your API key**
+   ```bash
+   # A .env.local file is automatically created for you when the Codespace starts.
+   # Edit .env.local and add your GOOGLE_API_KEY from https://aistudio.google.com/app/apikey
+   ```
+
+3. **Start the development server**
+   ```bash
+   npm run dev
+   ```
+
+4. **Open the app**
+   - VSCode will show a notification to open the forwarded port
+   - Click **Open in Browser** or navigate to the **Ports** tab
+
+That's it! The application is now running in your browser. 🎉
+
+---
+
+### Prerequisites (Local Development)
+
 
 - Node.js 18+ and npm
 - Google API Key with access to Gemini API