Upgrade Webpacker to version 2.0 (#3729)

config/webpack/development.js

@@ -2,6 +2,7 @@
 
 const merge = require('webpack-merge');
 const sharedConfig = require('./shared.js');
+const { settings, output } = require('./configuration.js');
 
 module.exports = merge(sharedConfig, {
   devtool: 'cheap-module-eval-source-map',
@@ -13,4 +14,19 @@ module.exports = merge(sharedConfig, {
   output: {
     pathinfo: true,
   },
+
+  devServer: {
+    clientLogLevel: 'none',
+    https: settings.dev_server.https,
+    host: settings.dev_server.host,
+    port: settings.dev_server.port,
+    contentBase: output.path,
+    publicPath: output.publicPath,
+    compress: true,
+    headers: { 'Access-Control-Allow-Origin': '*' },
+    historyApiFallback: true,
+    watchOptions: {
+      ignored: /node_modules/,
+    },
+  },
 });