docs: add 'or yarn' to README

README.md

@@ -2,7 +2,7 @@
 
 Welcome to the indieHD project documentation.
 
-This document repository aims to be a comprehensive guide to all development-related aspects of the indieHD project and caters specifically to web-developers and programmers. 
+This document repository aims to be a comprehensive guide to all development-related aspects of the indieHD project and caters specifically to web-developers and programmers.
 
 ?> Use the sidebar to navigate the documentation
 
@@ -16,6 +16,7 @@ The indieHD documentation site is built using `docsify`. To start a local serve
 
 ```shell
 npm run serve
+# or yarn serve
 ```
 
 By default the site will run on http://localhost:3000.