web.php

<?php

use Illuminate\Support\Facades\Route;
use Illuminate\Support\Str;
use Spatie\YamlFrontMatter\YamlFrontMatter;

Route::get('{slug?}', function ($slug = 'index') {
    $path = resource_path('pages/' . $slug . '.md');

    if (!file_exists($path)) {
        abort(404);
    }

    $data = cache()->remember($slug . filemtime($path), 60 * 60, function() use ($path) {
        $raw = file_get_contents($path);
        $object = YamlFrontMatter::parse($raw);

        return [
            'title' => $object->matter('title'),
            'body' => Str::markdown($object->body()),
        ];
    });

    return view('page', $data);
})->where('slug', '.*');