Ensure all content calls are using HTTPS

Issue: 
https://help.github.com/en/github/working-with-github-pages/securing-your-github-pages-site-with-https

When using my custom domain stillcaffeinated.dev, everything ugly breaks due to mixed content errors. Will need to go in & change all media calls to be over https. 
Requires a spike into how to resolve and properly host my media files. 