I made an html template for my email using boostrap 4 css. I would like to know where to include the .css (of 7000 lines) in order for my html page to appear properly
<link rel=“stylesheet” href=“https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css” integrity=“sha384-ggOyR0iXCbMQv3Xipma34MD+dH/1fQ784/j6cY/iJTQUOhcWr7x9JvoRxT2MZw1T” crossorigin=“anonymous”>
doesn't change anything.
Can maybe I upload inside the CRM the .css and make a link to it in my html page?