Tidy webpack configs.

config/webpack.rules.js

@@ -0,0 +1,59 @@
+const path = require("path");
+
+module.exports = [
+  {
+    test: /\.jsx?$/,
+    exclude: [
+      path.resolve(__dirname, '../node_modules')
+    ],
+    use: {
+      loader: 'babel-loader',
+      options: {
+        "presets": [
+          "@babel/preset-env",
+          "@babel/preset-react"
+        ],
+        "plugins": [
+          "react-hot-loader/babel",
+          "@babel/plugin-proposal-class-properties"
+        ],
+        "env": {
+          "test": {
+            "plugins": [
+              ["istanbul", {
+                "exclude": ["node_modules/**", "test/**"]
+              }]
+            ]
+          }
+        }
+      }
+    }
+  },
+  {
+    test: /\.(eot|ttf|woff|woff2)$/,
+    use: 'file-loader?name=fonts/[name].[ext]'
+  },
+  {
+    test: /\.ico$/,
+    use: 'file-loader?name=[name].[ext]'
+  },
+  {
+    test: /\.(svg|gif|jpg|png)$/,
+    use: 'file-loader?name=img/[name].[ext]'
+  },
+  {
+    test: /[\/\\](node_modules|global|src)[\/\\].*\.scss$/,
+    use: [
+      'style-loader',
+      "css-loader",
+      "sass-loader"
+    ]
+  },
+  {
+    test: /[\/\\](node_modules|global|src)[\/\\].*\.css$/,
+    use: [
+      'style-loader',
+      'css-loader'
+    ]
+  }
+];