I would move the files inside resources/assets folder either split it up or just put everything inside an adminlte folder. Then I would add the files needed for adminlte inside webpack.mix.js. So when you run npm run dev/prod, it will compile the css/js files and move the files you specified to be copied into the public folder.
And then I suppose I would made a layout file from the empty html file as a base for all the pages. And put the appropiate @yields and what not so you can use something like
@extends('layouts.master')
@section('content') page content here @stop
On all the other blade files to extend the layout.
If you want to make it even easier but with you in less control, you could probably use something like this to speed it up: