build: migrate autoprefixer from CJS require to ES module import

vite.config.mts

@@ -0,0 +1,23 @@
+import { fileURLToPath, URL } from 'node:url'
+
+import { defineConfig } from 'vite'
+import { imagetools } from 'vite-imagetools'
+import autoprefixer from 'autoprefixer'
+import vue from '@vitejs/plugin-vue'
+
+// https://vitejs.dev/config/
+export default defineConfig({
+  base: '/sebin/',
+  plugins: [vue(), imagetools()],
+  resolve: {
+    alias: {
+      '@': fileURLToPath(new URL('./src', import.meta.url))
+    }
+  },
+  css: {
+    devSourcemap: true,
+    postcss: {
+      plugins: [autoprefixer({})]
+    }
+  }
+})