yude.jp/vite.config.ts

import { defineConfig } from 'vite'
import { resolve } from "path";
import react from '@vitejs/plugin-react-swc'

// https://vitejs.dev/config/
export default defineConfig({
  plugins: [react()],
  build: {
    sourcemap: true,
    rollupOptions: {
      input: {
        main: resolve(__dirname, 'index.html'),
        404: resolve(__dirname, '404.html'),
      }
    }
  }
}
)