Adding pinterest save button to blog posts

Hello support,

Is it possible to add the pinterest save button to all blog posts in the Spirit Theme?

Here is the code that needs to be added to each post:

and this script needs to be added to each page before the /body tag:
<script async defer src="//assets.pinterest.com/js/pinit.js"></script>

This is where I got this from if you need more info: https://developers.pinterest.com/tools/widget-builder/?type=pinit

Many thanks
Scott