Adjust compiled asset filenames

webpack.config.js

@@ -14,6 +14,7 @@ Encore
     .enableSassLoader()
     .enableVueLoader()
     .autoProvidejQuery()
+    .enableVersioning()
     .enableSourceMaps(!Encore.isProduction())
     .cleanupOutputBeforeBuild()
     .enablePostCssLoader()
@@ -23,8 +24,8 @@ Encore
         { from: './node_modules/leaflet/dist/images', to: 'images/[name].[ext]' },
     ])
     .configureFilenames({
-        js: 'js/[name].js',
-        css: 'css/[name].css',
+        js: 'js/[name].[contenthash].js',
+        css: 'css/[name].[contenthash].css',
     })
     .configureImageRule({
         filename: 'images/[name][ext]',