To use this font in your website add the following code to the head of your html page:
<link rel="stylesheet" media="screen" href="https://fontlibrary.org//face/octagon" type="text/css"/>
Now you can use this font in your css file. Here is an example of a paragraph set in Octagon Regular.
If you are interested in working on Octagon, please read our guide on how to contribute to an existing font.