[DEMO] Add image demo

Author: dangngocduc

README.md

@@ -3,11 +3,15 @@
 # Build Release
 [Releases APK](https://github.com/dangngocduc/instagram_flutter/releases)
 
-|Demo | Demo | Demo | Demo |
-|:----|:----|:----|:----|
-|![](./demo/login_page_dark.png)|![](./demo/login_page_light.png)|![](./demo/activity_page_dark.png)|![](./demo/activity_page_light.png)|
-|![](./demo/home_page_dark.png)|![](./demo/home_page_light.png)|![](./demo/activity_page_dark.png)|![](./demo/activity_page_light.png)|
-|![](./demo/search_page_dark.png)|![](./demo/search_page_light.png)|![](./demo/account_page_light.png)|![](./demo/account_page_dark.png)|
-|![](./demo/explore_page_dark.png)|![](./demo/explore_page_light.png)|![](./demo/story_page.png)|![](./demo/account_page_dark.png)|
+|Dark Mode | Light Mode |
+|:----|:----|
+|![](./demo/login_page_dark.png)|![](./demo/login_page_light.png)|
+|![](./demo/home_page_dark.png)|![](./demo/home_page_light.png)|
+|![](./demo/activity_page_dark.png)|![](./demo/activity_page_light.png)|
+|![](./demo/search_page_dark.png)|![](./demo/search_page_light.png)|
+|![](./demo/account_page_light.png)|![](./demo/account_page_dark.png)|
+|![](./demo/explore_page_dark.png)|![](./demo/explore_page_light.png)|
+|![](./demo/story_page.png)|![](./demo/account_page_dark.png)|
+|![](./demo/comment_page_dark.jpg)|![](./demo/comment_page_light.jpg)|