Gui - A Ghost Static Site Generator
If you don't want to host your Ghost blog on a server, you may want to try Ghost Static Generator and push the content to your GitHub repo. There is one Python-based Ghost content crawler call buster. However, the tool is no longer maintained by the author for more than 5 years.
Use GitHub Repo to Host Images
GitHub remains one of the most reliable repository website for code, but we can also utilize its storage capability to host images for our website. The easiest way is simply to upload/push image files to your GitHub repo and get the link from the web. But beyond manual upload, we always prefer elegant ways.