refactor: Replace Webpack with Vite (#53)

postcss.config.cjs

@@ -0,0 +1,14 @@
+/* eslint-disable global-require */
+/** @type {import('postcss-load-config').Config} */
+const config = {
+    plugins:
+        process.env.NODE_ENV !== 'development'
+            ? [
+                  require('cssnano')({
+                      preset: 'advanced',
+                  }),
+              ]
+            : [],
+};
+
+module.exports = config;