Add types to postcss.config.cjs

postcss.config.cjs

@@ -1,7 +1,10 @@
-module.exports = ({ env }) => ({
+/** @type {import('postcss-load-config').ConfigFn} */
+const config = ({ env }) => ({
   plugins: {
     tailwindcss: {},
     autoprefixer: {},
     cssnano: env === 'production' ? {} : false,
   },
 });
+
+module.exports = config;