frontend: basic skeleton

frontend/vite.config.ts

@@ -1,10 +1,12 @@
 import { defineConfig } from 'vite'
 import react from '@vitejs/plugin-react'
+import tailwindcss from '@tailwindcss/vite'
 
 // https://vite.dev/config/
 export default defineConfig({
-  plugins: [react()],
+  plugins: [react(), tailwindcss()],
   server: {
+    // For development only: proxy /api to backend running on separate port.
     proxy: {
       '/api': {
         target: 'http://localhost:3000',