Update quickstart.mdx

Author: mintlify-development[bot]

quickstart.mdx

@@ -1,6 +1,31 @@
 ---
 title: Quickstart
-description: Get started with Mintlify in minutes
+description: Create beautiful documentation in under 5 minutes
 ---
 
-Run `npx create-mintlify-app@latest` to get started.
+## Get started instantly
+
+<Steps>
+  <Step title="Initialize your docs">
+    ```bash
+    npx create-mintlify-app@latest my-docs
+    cd my-docs
+    ```
+  </Step>
+  
+  <Step title="Start the development server">
+    ```bash
+    mintlify dev
+    ```
+  </Step>
+  
+  <Step title="Edit your first page">
+    Open `introduction.mdx` and start writing your documentation.
+  </Step>
+</Steps>
+
+Your documentation site is now running at `localhost:3000`. 
+
+<Card title="What's next?" icon="arrow-right">
+  Deploy your docs to production with `mintlify deploy` or connect your GitHub repository for automatic deployments.
+</Card>