Improve installation instructions

[top-master]

I had some hard time trying to get this working,
And it would be nice if something about "APP_KEY" could be appended to the installation instructions, like below:

---

After above, ensure that your ".env" file at least contains the empty key-option "APP_KEY=",
And run below to generate and set a key option in your ".env" configuration file:

php artisan key:generate
php artisan config:cache

---

Another problem was that the "public/.htaccess" file did not exist and I added one from another Laravel project, something like:

<IfModule mod_rewrite.c>
    <IfModule mod_negotiation.c>
        Options -MultiViews -Indexes
    </IfModule>

    RewriteEngine On

    # Handle Authorization Header
    RewriteCond %{HTTP:Authorization} .
    RewriteRule .* - [E=HTTP_AUTHORIZATION:%{HTTP:Authorization}]

    # Redirect Trailing Slashes If Not A Folder...
    RewriteCond %{REQUEST_FILENAME} !-d
    RewriteCond %{REQUEST_URI} (.+)/$
    RewriteRule ^ %1 [L,R=301]

    # Handle Front Controller...
    RewriteCond %{REQUEST_FILENAME} !-d
    RewriteCond %{REQUEST_FILENAME} !-f
    RewriteRule ^ index.php [L]
</IfModule>

[ulearnpro]

@top-master Thanks for your suggestion, Now I have added the .env and .htaccess file to the repo..

[ulearnpro]

Added .env and .htaccess files