super minimal server react setup

index.js

import React from 'react';
import ReactDOMServer from 'react-dom/server';

import express from 'express'


const app = express();

app.get('/', (_, res) => {
  console.log()
  const App = () => <p>ohayo</p>;
  const reactContent = ReactDOMServer.renderToString(<App />);

  res.send(reactContent);
});


const {PORT = 8181} = process.env;
console.log(`about to listen on 0.0.0.0:${PORT}`);
app.listen(PORT);

package.json

{
  "name": "simple-server",
  "version": "1.0.0",
  "main": "index.js",
  "license": "MIT",
  "scripts": {
    "watch": "NODE_ENV=development webpack -w",
    "build": "NODE_ENV=production webpack",
    "serve": "nodemon dist/dist.js"
  },
  "dependencies": {
    "babel-core": "^6.26.3",
    "babel-loader": "^7.1.5",
    "babel-preset-env": "^1.7.0",
    "babel-preset-react": "^6.24.1",
    "express": "^4.16.3",
    "nodemon": "^1.18.1",
    "react": "^16.4.1",
    "react-dom": "^16.4.1",
    "webpack": "^4.16.0",
    "webpack-cli": "^3.0.8"
  }
}

webpack.config.js

module.exports = {
  entry: './index.js',
  output: {
    filename: 'dist.js',
  },
  devtool: 'source-map',
  mode: process.env.NODE_ENV || 'production',
  target: 'node',
  module: {
    rules: [
      {
        test: /\.jsx?$/,
        exclude: /node_modules/,
        use: {
          loader: 'babel-loader',
          options: {
            presets: [['env', {'targets': {node: 'current'}}], 'react'],
          }
        }
      },
    ]
  }
}