Change spring boot icon on app

I have Shinyproxy running a simple Shiny app, my structure so far is:

├── app/
│ └── app.r/
├── application.yml
├── Dockerfile

I want to change the icon that it’s displayed in the Chrome tab, currently the Spring boot icon. Where should I put my icon.png and what lines should I modify in my application.yml.

I’ve searched the posts in the forum and there’s no updated straight response to this question.