Merge pull request #864 from Red007Master/patch-1

DOCS: Fixing, from `npm build` to `npm run build`.

Author: hatemhosny

docs/docs/features/self-hosting.mdx

@@ -21,7 +21,7 @@ Fork the [GitHub repo](https://github.com/live-codes/livecodes) and clone it. Yo
   git clone https://github.com/{your-username}/livecodes
   cd livecodes
   npm install
-  npm build          # build the app to "build" directory
+  npm run build      # build the app to "build" directory
   npm run serve      # locally serve to http://localhost:8080
 
   # deploy