<link rel="stylesheet" href="path/to/font-awesome-pro-v6/css/all.min.css">
Obtain the Font Awesome Pro v6 package:
Sign in to your Font Awesome account. Download the Font Awesome Pro v6 package, which includes the necessary CSS and font files. Replace “path/to/font-awesome-pro-v6” with the actual path where you have stored the Font Awesome Pro v6 CSS file. By adding the <link> tag to your Discourse theme’s “head_tag.html” file, you’re referencing the Font Awesome Pro v6 CSS file, which will load the necessary styles for the icons. Remember to adjust the path in the <link> tag to point to the correct location of your Font Awesome Pro v6 CSS file.