webpack.config.js

const path = require("path");
const webpack = require("webpack");
const BundleAnalyzerPlugin = require('webpack-bundle-analyzer').BundleAnalyzerPlugin;
const HtmlWebpackPlugin = require('html-webpack-plugin');


module.exports = {
  entry: path.resolve(__dirname, "src", "index.js"),
  output: {
    chunkFilename: "[name].js",
    filename: "[name].js",
    path: path.resolve(__dirname, "dist"),
    publicPath: "/some_dir/"
  },
  module: {
    rules: [
      {
        test: /\.js/,
        use: 'babel-loader',
        exclude: /node_modules/,
      }
    ]
  },
  plugins: [
    new webpack.optimize.CommonsChunkPlugin({
      name: 'vendor',
      minChunks: function (module) {
        return module.context && module.context.indexOf('node_modules') !== -1;
      }
    }),
    new webpack.optimize.CommonsChunkPlugin({
      name: 'manifest'
    }),
    new HtmlWebpackPlugin({
      template: "./src/index.ejs",
    }),
    //new BundleAnalyzerPlugin()
  ],
  devtool: "cheap-eval-source-map",
  devServer: {
    contentBase: path.resolve(__dirname, 'dist'),
    compress: true,
    historyApiFallback: true,
    port: 3000,
    publicPath: "/some_dir/"
  }
};