feat: add basic webui

packages/feature-flags/access.ts

@@ -0,0 +1,26 @@
+import { type ApiData, verifyAccess } from '@vercel/flags';
+import { type NextRequest, NextResponse } from 'next/server';
+import * as flags from './index';
+
+export const getFlags = async (request: NextRequest) => {
+  const access = await verifyAccess(request.headers.get('Authorization'));
+
+  if (!access) {
+    return NextResponse.json(null, { status: 401 });
+  }
+
+  const definitions = Object.fromEntries(
+    Object.values(flags).map((flag) => [
+      flag.key,
+      {
+        origin: flag.origin,
+        description: flag.description,
+        options: flag.options,
+      },
+    ])
+  );
+
+  return NextResponse.json<ApiData>({
+    definitions,
+  });
+};