deploy linting and first unit test maybe

vite.config.ts

@@ -1,16 +1,27 @@
+/// <reference types="vitest" />
 import path from 'path';
-import { defineConfig } from 'vite';
+import { defineConfig as defineViteConfig } from 'vite';
+import { defineConfig as defineVitestConfig } from 'vitest/config';
 import react from '@vitejs/plugin-react';
 
-export default defineConfig({
+const vitestConfig = defineVitestConfig({
+  test: {
+    environment: 'jsdom',
+    setupFiles: ['./vitest.setup.ts'],
+  },
+});
+
+const viteConfig = defineViteConfig({
+  plugins: [react()],
   server: {
     port: 3000,
     host: '0.0.0.0',
   },
-  plugins: [react()],
   resolve: {
     alias: {
       '@': path.resolve(__dirname, '.'),
     }
-  }
+  },
 });
+
+export default { ...viteConfig, test: vitestConfig.test };