Add Webpack Encore

webpack.config.js

@@ -0,0 +1,20 @@
+var Encore = require('@symfony/webpack-encore');
+
+Encore
+    .setOutputPath('source/build/')
+    .setPublicPath('/build')
+    .cleanupOutputBeforeBuild()
+    .enableLessLoader()
+    .addEntry('js/site', './assets/js/main.js')
+    .addStyleEntry('css/site', './assets/less/main.less')
+    .enablePostCssLoader(function(options) {
+        options.config = {
+            path: 'config/postcss.config.js'
+        };
+    })
+    .enableSourceMaps(!Encore.isProduction())
+    .enableVersioning(false)
+    .enableBuildNotifications()
+;
+
+module.exports = Encore.getWebpackConfig();