Clean up app example

examples/app/package.json

@@ -2,7 +2,7 @@
   "private": true,
   "name": "jupyterlab-example-app",
   "scripts": {
-    "build": "webpack --config webpack.conf.js",
+    "build": "webpack",
     "clean": "rimraf build"
   },
   "dependencies": {
@@ -39,6 +39,7 @@
   "devDependencies": {
     "file-loader": "^0.9.0",
     "rimraf": "^2.5.2",
+    "style-loader": "^0.13.1",
     "url-loader": "^0.5.7",
     "watch": "^0.18.0",
     "webpack": "^2.2.1"

examples/app/webpack.conf.js → examples/app/webpack.config.js

@@ -18,7 +18,7 @@ module.exports = {
   bail: true,
   devtool: 'source-map',
   module: {
-    loaders: [
+    rules: [
       { test: /\.css$/, use: [ 'style-loader', 'css-loader' ] },
       { test: /\.json$/, use: 'json-loader' },
       { test: /\.html$/, use: 'file-loader' },