We recently switched from using Medium.com to Ghost for our blog. The Ghost blog is hosted on DigitalOcean and we set it up using DO's 1-click solution and it could not have been more easier. However, it came with one big caveat. There were no social sharing options at the page or the post level.
This was a major drawback and we were not keen on buying a premium theme to solve this simple problem. After doing some research, it turned out that modifying the theme isn't that complicated. So we did exactly that!
Checkout this commit if you're interested in the changes.
If you have any questions, please holler at @sharathprabhal.