Explicitly include assets to cache

Author: code-asher

scripts/webpack.client.config.js

@@ -66,10 +66,12 @@ module.exports = (options = {}) => merge(
 			}],
 		})
 	].concat(prod ? [
+		// Exclude everything from the precache and add everything we want to be
+		// cached at runtime.
 		new GenerateSW({
-			exclude: [/\.html$/],
+			exclude: [/.*/],
 			runtimeCaching: [{
-				urlPattern: new RegExp("^(?!.*\.html)"),
+				urlPattern: /\.(?:png|jpg|jpeg|svg|css|js|ttf|woff|eot|woff2)$/,
 				handler: "StaleWhileRevalidate",
 				options: {
 					cacheName: "code-server",