React Milkshake Serverless is a boilerplate for building react applications. It's built using Nextjs, Redux, Firebase, Firestore, Styled-components and it includes a cool CLI for generating complete CRUD actions. You can start with having authentication and a cloud-based database out of the box, which could save you a lot of time.
Super cool to have my first sales for this boilerplate and can't wait to see what people will build!