add frontend template + GET /users/{userRef} route

vite.config.ts

@@ -0,0 +1,18 @@
+import { defineConfig } from "vite";
+import react from "@vitejs/plugin-react";
+
+// https://vitejs.dev/config/
+export default defineConfig({
+  root: "frontend",
+  plugins: [react()],
+  server: {
+    proxy: {
+      "/api": {
+        // assumes port 8080 in .env for development
+        target: "http://localhost:8080",
+        changeOrigin: true,
+        rewrite: (path) => path.replace(/^\/api/, ""),
+      },
+    },
+  },
+});