I want to access from url bar "product". ".../product/paracetamol 1" but I give this "Undefined variable: product (0)."

Thi is my route

Route::resource('/', 'IndexPageController');
Route::get('/shop', 'ShopController@index');
Route::get('/shop/{product}', 'ShopController@show')

And this my method show

public function show($slug)
{
    $product = Product::where('slug', $slug)->firstOrFail();

    return view('product')->with('product', $product);
}

this is in product.blade.php

<h4 class="card-title"></h4>
<p class="card-text"></p>

via Chebli Mohamed