docs: Add detailed server-side verification steps to the deployment guide.

DEPLOY.md

@@ -83,11 +83,35 @@ docker-compose up -d --build
 
 ## Step 6: Verify
 
+### From your browser
+
 Open your browser and visit your EC2 Public IP:
 `http://your-ec2-public-ip/`
 
 The app should be running!
 
+### From the server terminal (SSH)
+
+You can check if the server is running correctly directly on the instance:
+
+1.  **Check running containers:**
+    ```bash
+    docker-compose ps
+    ```
+    You should see `wondersheets-backend-1` and `wondersheets-frontend-1` with status `Up`.
+
+2.  **Check local connection:**
+    ```bash
+    curl -I http://localhost
+    ```
+    You should see `HTTP/1.1 200 OK`.
+
+3.  **View Logs:**
+    ```bash
+    docker-compose logs -f
+    ```
+
+
 ---
 
 ### Troubleshooting