Update postcss.config.cjs to include cssnano preset

postcss.config.cjs

@@ -1,3 +1,8 @@
 module.exports = {
-	plugins: [require("autoprefixer"), require("cssnano")],
+	plugins: [
+		require("autoprefixer"),
+		require("cssnano")({
+			preset: "default",
+		}),
+	],
 };