shortcode to add templates

Hello guys,

I need some help to make this snippet work. I am trying to add a shortcode to display my html page wherever I like to, but there must be an error somewhere and I don’t seem to be able to solve the issue! I added this code to my functions.php file, in my child theme:

add_shortcode("equipe", "equipe");  
function equipe_html( $atts ) {  
ob_start();
include('./wp-content/themes/twentyseventeen_child/shortcode-equipe.php');
$stringa = ob_get_contents();
ob_end_clean();
return $stringa;
}

Once added, I created a file called shortcode-equipe.php in which I wrote my html code and I uploaded both files into the child theme directory. Finally, I created a new page and I used [equipe] to display my equipe, but I can only see the shortcode [equipe] as an output. What did I do wrong? Can someone please help?

Thanks a lot

Cheers

Enrico