feat: setup dataset enrichment app codebase and scripts

frontend/vite.config.js

@@ -0,0 +1,17 @@
+import { defineConfig } from 'vite'
+import react from '@vitejs/plugin-react'
+
+// In dev the SPA runs on 5173 and the API on 8000; this proxy keeps every fetch
+// same-origin, so the code is identical to how nginx serves it in Docker.
+export default defineConfig({
+  plugins: [react()],
+  server: {
+    port: 5173,
+    proxy: {
+      '/api': {
+        target: process.env.API_URL || 'http://localhost:8000',
+        changeOrigin: true,
+      },
+    },
+  },
+})