To get started with react and rails I used a gem called react-rails. The gem allows you to do server side rendering as well which I thought could be pretty useful. Getting everything setup was as simple as following their README and I was building react examples in no time.
I also added eslint as a linting utility for my .jsx files. Getting this running required nodejs and npm. I managed to figure (with a bit of GoOgle) I could install what I needed globally using npm.
npm install -g eslint eslint-config-standard eslint-plugin-standard eslint-plugin-react
once installed you create a .eslintrc file and run it as follows.
All in all I am quite happy with the outcome of the shopping list and also really enjoying using reactjs. Next up is figuring out how to write jasmine tests for my react components.