React.js PWA boilerplate

Hello, I need a react pwa boilerplate that I can use as a starting point for creating a few different apps that will hook into an external api. I don't need any design or theming, I can do that later. Here are the three things I do need: - Latest React.js (16+) - Server Side Rendering. - State management using mobx-state-tree with a routing setup that keeps the state in sync with the current route. Routing scheme should be in this format: "/user" and "/user/:id". You can use any open source api to develop this (doesn't have to be a user), I will hook it up to the actual api later. - Basic pwa setup with a manifest and a registered service worker as well as a service worker configuration file. If you start the project using create-react-app it's ok to eject if necessary as I suspect you will need separate webpack configs for server and client. I would like this to be custom - not using a generator of some kind (other than create-react-app). I would prefer if the project be reviewable via github. Thanks!