Insert custom code into filament base Header and Footer

I'm trying to use package https://github.com/shailesh-ladumor/laravel-pwa that instructs me to add few line of code in the root blade file in header and footer section and I'm unable to figure out how to do that.
GitHub
Ladumor Laravel PWA makes laravel's website a progressive web application. - shailesh-ladumor/laravel-pwa
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