It looks like CC Sign Language was a paid-for font. You would have to check the copyright notice on the font just to double check to make sure you’re okay to use the font on a website (as opposed to your comic or in an image). As long as you’re clear on that front, you can use Font Squirrel to create a web for for use on your website. Just upload the font file on your computer, and it will give you the necessary web font files, and some css to include on your site that will point to those font files whenever you want to use that font.