You can also use something like this site to generate the files for your icons, mentioned in a previous post of mine:
That site has instructions for how to apply them in your code once they are generated and you simply place those generated files in your assets/static location like @APB9785 mentioned. Also, you can reference their instructions with the instructions from this post from @idi527:
Hope that helps in terms of how you make your favicons “work”.
