Font-Awesome SVG Icons are released under the SIL Open Font License.  You can read more here: https://en.wikipedia.org/wiki/SIL_Open_Font_License

<div>Icons made by <a href="https://www.flaticon.com/authors/chanut" title="Chanut">Chanut</a> from <a href="https://www.flaticon.com/" title="Flaticon">www.flaticon.com</a> is licensed by <a href="http://creativecommons.org/licenses/by/3.0/" title="Creative Commons BY 3.0" target="_blank">CC 3.0 BY</a></div>

Anything not covered by the license above is released into the public domain via CC0-1.0 Universal Public Domain Dedication (https://creativecommons.org/publicdomain/zero/1.0/).