feat($config): Mock-out Node.js libraries to secure the run-time in the browser

Author: halfzebra

config/webpack.config.dev.js

@@ -197,5 +197,15 @@ module.exports = {
     new HotModuleReplacementPlugin(),
 
     new NamedModulesPlugin()
-  ]
+  ],
+
+  // Some libraries import Node modules but don't use them in the browser.
+  // Tell Webpack to provide empty mocks for them so importing them works.
+  node: {
+    dgram: 'empty',
+    fs: 'empty',
+    net: 'empty',
+    tls: 'empty',
+    child_process: 'empty',
+  },
 };

config/webpack.config.prod.js

@@ -242,5 +242,14 @@ module.exports = {
       // Don't precache sourcemaps (they're large) and build asset manifest:
       staticFileGlobsIgnorePatterns: [/\.map$/, /asset-manifest\.json$/]
     })
-  ]
+  ],
+  // Some libraries import Node modules but don't use them in the browser.
+  // Tell Webpack to provide empty mocks for them so importing them works.
+  node: {
+    dgram: 'empty',
+    fs: 'empty',
+    net: 'empty',
+    tls: 'empty',
+    child_process: 'empty',
+  },
 };