https with Adminlte

Hi everyone. I'm stucked with this problem:

I have integrated the adminlte to my laravel project.

on my

<!-- landig.blade.php -->
<!-- Custom styles for this template -->
    <link href="{{ asset('/css/all-landing.css') }}" rel="stylesheet">

That line generate this

    <!-- On heroku -->
    <link href="http://makpropiedades.herokuapp.com/css/all-landing.css" rel="stylesheet">

How can I go from http to https?

Level 33

Change APP_URL in your .env file?

Level 1

If this is deployed on heroku, what shoud I code in that line? Furthermore. Isn't .env file ignored by default?

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