docs(readme): update

README.md

@@ -1,22 +1,9 @@
 # Default Light UI Theme for Inkdrop
 
-Inkdrop's UI elements are styled based on [Semantic UI](http://semantic-ui.com/).
-It's mostly common in customizing the theme with it, so [their documentation](http://learnsemantic.com/) is very helpful to get started.
+> [!NOTE]
+> Do not fork this repository to create your own theme. Please read the documentation linked below.
 
-Read [the documentation](https://developers.inkdrop.app/guides/create-a-theme) for detailed instructions.
-
-## How to build
+The default light UI theme for Inkdrop.
 
-```
-npm install
-npm build
-```
-
-## Which files to edit
+Read [the documentation](https://developers.inkdrop.app/guides/create-a-theme) for detailed instructions.
 
-- `src/site/globals/site.variables`
-  - Variables for Inkdrop-specific components
-- `src/site/globals/site.overrides`
-  - Declarations of CSS variables
-- `src/themes/default/globals/site.variables`
-  - Common variables