App Icons and Favicon
For rendering App Icons and favicon, RAN is using
/components/AppIcons/index.js. Basically, This component is pushing standard icon data to document.
Change Icon Images
You can copy your icon (with same names) to
/static/icons/ folder. It will start to use your icon immediately.
Change the path of Icons
You can make your changes on
/components/AppIcons/index.js file. Every icons are coming from this component.