updated deploy instructions, improved building script

front/vite.config.js

@@ -2,7 +2,9 @@ import { defineConfig } from 'vite'
 import react from '@vitejs/plugin-react'
 
 // https://vitejs.dev/config/
-export default defineConfig({
-  base: "/static",
-  plugins: [react()],
-})
+export default defineConfig(
+  ({ command }) => ({
+    base: (command === 'serve') ? "/" : "/static",
+    plugins: [react()],
+  })
+)