add outro section

Author: nemanjam

src/content/post/2025/04-02-astro-react-gallery/index.mdx

@@ -639,6 +639,10 @@ src/components/react/hooks/useWidth.tsx
 git checkout e0165b295db2ccc72bbbb7be4bdd7eb48f7dedae
 ```
 
+## Outro
+
+That was a pretty long read, thank you for your attention and dedication. Have you implemented an Astro image gallery yourself and used a different approach? Do you have suggestions for improvements or spotted anything incorrect? Don't hesitate to leave a comment below. 
+
 ## References
 
 - Astro gallery example, inspiration to take Photoswipe for a lightbox component https://github.com/EmaSuriano/astro-art-portfolio