webpack.config.js

const path = require('path')
const webpack = require('webpack')
const HtmlWebpackPlugin = require('html-webpack-plugin')
const CopyWebpackPlugin = require('copy-webpack-plugin')
const Dotenv = require('dotenv-webpack')
const EnvPlugin = process.env.NODE_ENV === 'production' ?  (
  new webpack.EnvironmentPlugin({ ...process.env })
) : (
  new Dotenv()
)

module.exports = {
  entry: './src/app.js',
  output: {
    path: path.resolve('public'),
    filename: 'bundle.js'
  },
  devtool: 'source-maps',
  module: {
    rules: [
      { test: /\.jsx?$/, loader: 'babel-loader', exclude: /node_modules/ },
      { test: /\.css$/, loader: ['style-loader', 'css-loader'] },
      { test: /\.s(a|c)ss$/, loader: ['style-loader', 'css-loader', 'sass-loader'] },
      {
        test: /\.(gif|jpe?g|png)$/,
        loader: 'url-loader?limit=25000',
        query: {
          limit: 10000,
          name: 'static/media/images/[name].[hash:8].[ext]'
        }
      }

    ]
  },
  devServer: {
    contentBase: path.resolve('src'),
    hot: true,
    open: true,
    port: 8000,
    watchContentBase: true,
    proxy: {
      '/api': 'http://localhost:4000'
    }
  },
  plugins: [
    new webpack.HotModuleReplacementPlugin(),
    EnvPlugin,
    new HtmlWebpackPlugin({
      template: 'src/index.html',
      filename: 'index.html',
      inject: 'body'
    }),
    new CopyWebpackPlugin([
      { from: '/src/assets', to: 'assets'}
    ])
  ]
}