Out of curiosity - why and where would you use React? I had a quick look at your blog and React seems like total overkill. You are serving static HTML files, you don't have moving parts and your website doesn't have (and probably doesn't need) a changing state. You won't get any benefit from React's Virtual DOM and you don't need React's components, because you have Jekyll's own template system (Liquid).
There is a big possibility of overcomplicating the whole build process by introducing new dependencies and end up serving unneeded JS code to your users.
Why not write your interaction and presentation logic in plain JavaScript, instead of using UI libraries and bundlers?