React create app (Redux etc)

index.jsx

import React from 'react'
import { render } from 'react-dom'
import { Provider } from 'react-redux'
import { ConnectedRouter } from 'connected-react-router'
import store, { history } from './store'
import App from './containers/app'

import 'sanitize.css/sanitize.css'
import './index.css'

const target = document.querySelector('#root')

render(
  <Provider store={store}>
    <ConnectedRouter history={history}>
      <div>
        <App />
      </div>
    </ConnectedRouter>
  </Provider>,
  target
)

now.json

{
    "type": "static",
    "static": {
        "rewrites": [
            {
                "source": "**",
                "destination": "/index.html"
            }
        ]
    }
}

package.json

{
  "private": true,
  "homepage": "https://create-react-app-redux.now.sh",
  "scripts": {
    "deploy": "now && now alias",
    "start": "react-scripts start",
    "now-start": "serve -s ./build",
    "build": "react-scripts build",
    "test": "react-scripts test --env=jsdom",
    "eject": "react-scripts eject",
    "precommit": "pretty-quick --staged"
  },
  "devDependencies": {
    "prettier": "1.14.3",
    "react-scripts": "2.0.4"
  },
  "dependencies": {
    "connected-react-router": "4.5.0",
    "react": "16.5.2",
    "react-dom": "16.5.2",
    "react-redux": "5.0.7",
    "react-router": "4.3.1",
    "react-router-dom": "4.3.1",
    "redux": "4.0.0",
    "redux-thunk": "2.3.0",
    "sanitize.css": "7.0.3",
    "serve": "10.0.2"
  }
}

simple.Dockerfile

# Use Node.js version 10
FROM mhart/alpine-node:10

# Set the working directory
WORKDIR /usr/src

# Copy package manager files to the working directory and run install
COPY package.json yarn.lock ./
RUN yarn install

# Copy all files to the working directory
COPY . .

# Run tests
RUN CI=true yarn test

# Build the app and move the resulting build to the `/public` directory
RUN yarn build
RUN mv ./build /public

store.js

import { createStore, applyMiddleware, compose } from 'redux'
import { connectRouter, routerMiddleware } from 'connected-react-router'
import thunk from 'redux-thunk'
import createHistory from 'history/createBrowserHistory'
import rootReducer from './modules'

export const history = createHistory()

const initialState = {}
const enhancers = []
const middleware = [thunk, routerMiddleware(history)]

if (process.env.NODE_ENV === 'development') {
  const devToolsExtension = window.__REDUX_DEVTOOLS_EXTENSION__

  if (typeof devToolsExtension === 'function') {
    enhancers.push(devToolsExtension())
  }
}

const composedEnhancers = compose(
  applyMiddleware(...middleware),
  ...enhancers
)

export default createStore(
  connectRouter(history)(rootReducer),
  initialState,
  composedEnhancers
)