The config is beyond minimal. If you're using webpack you may want to look away now :-)

    import { resolve } from 'path'
    
    import { defineConfig } from 'vite'
    import reactRefresh from '@vitejs/plugin-react-refresh'
    
    
    export default defineConfig({
      plugins: [reactRefresh()],
      build: {
        rollupOptions: {
          input: {
            index: resolve(__dirname, 'index.html'),
          }
        },
        sourcemap: true
      },
      esbuild: {
        jsxInject: `import * as React from "react"`
      },
      resolve: {
        alias: [
          { find: '@', replacement: '/src' },
        ]
      },
    })